Batches changedapi/messages/batches
Nearest release: v2.1.286, published an hour after this site recorded the change. Shown because the two are within 24 hours of each other. Nothing here says the release caused the edit.
Recorded here
Lines+385added
Lines−415removed
From line
1,095
where the diff opens
First seen
14 Aug 2026
this site's first read of the page
Recorded edits16to this page, all time
The whole hunk
from line 1095, old and new numbered
/
This page is larger than the 256 KiB this site keeps, so one side of the diff below stops where the stored text does.
from line 1095
10951095
10961096 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
10971097
1098 - `"claude-sonnet-5-5" or "claude-fable-5-1" or "claude-opus-5-5" or 16 more`
1098 - `"claude-sonnet-5-5"`
10991099
1100 The model that will complete your prompt.
1100 Efficient model for coding and agents
11011101
1102 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
1102 - `"claude-fable-5-1"`
11031103
1104 - `"claude-sonnet-5-5"`
1104 Frontier intelligence for ambitious tasks across coding, scientific discovery, and enterprise workflows
11051105
1106 Efficient model for coding and agents
1106 - `"claude-opus-5-5"`
11071107
1108 - `"claude-fable-5-1"`
1108 Powerful intelligence for coding, knowledge work, and long-running agents
11091109
1110 Frontier intelligence for ambitious tasks across coding, scientific discovery, and enterprise workflows
1110 - `"claude-mythos-5-1"`
11111111
1112 - `"claude-opus-5-5"`
1112 Our most capable model for cybersecurity and biology research, available through trusted access programs
11131113
1114 Powerful intelligence for coding, knowledge work, and long-running agents
1114 - `"claude-sonnet-5"`
11151115
1116 - `"claude-mythos-5-1"`
1116 Efficient model for coding and agents
11171117
1118 Our most capable model for cybersecurity and biology research, available through trusted access programs
1118 - `"claude-fable-5"`
11191119
1120 - `"claude-sonnet-5"`
1120 Next generation of intelligence for the hardest knowledge work and coding problems
11211121
1122 Efficient model for coding and agents
1122 - `"claude-mythos-5"`
11231123
1124 - `"claude-fable-5"`
1124 Most capable model for cybersecurity and biology research
11251125
1126 Next generation of intelligence for the hardest knowledge work and coding problems
1126 - `"claude-opus-5"`
11271127
1128 - `"claude-mythos-5"`
1128 Powerful intelligence for long-running agents and coding
11291129
1130 Most capable model for cybersecurity and biology research
1130 - `"claude-opus-4-8"`
11311131
1132 - `"claude-opus-5"`
1132 Powerful intelligence for long-running agents and coding
11331133
1134 Powerful intelligence for long-running agents and coding
1134 - `"claude-opus-4-7"`
11351135
1136 - `"claude-opus-4-8"`
1136 Powerful intelligence for long-running agents and coding
11371137
1138 Powerful intelligence for long-running agents and coding
1138 - `"claude-opus-4-6"`
11391139
1140 - `"claude-opus-4-7"`
1140 Powerful intelligence for long-running agents and coding
11411141
1142 Powerful intelligence for long-running agents and coding
1142 - `"claude-sonnet-4-6"`
11431143
1144 - `"claude-opus-4-6"`
1144 Best combination of speed and intelligence
11451145
1146 Powerful intelligence for long-running agents and coding
1146 - `"claude-haiku-4-5"`
11471147
1148 - `"claude-sonnet-4-6"`
1148 Fastest model with near-frontier intelligence
11491149
1150 Best combination of speed and intelligence
1150 - `"claude-haiku-4-5-20251001"`
11511151
1152 - `"claude-haiku-4-5"`
1152 Fastest model with near-frontier intelligence
11531153
1154 Fastest model with near-frontier intelligence
1154 - `"claude-opus-4-5"`
11551155
1156 - `"claude-haiku-4-5-20251001"`
1156 Powerful intelligence for long-running agents and coding
11571157
1158 Fastest model with near-frontier intelligence
1158 - `"claude-opus-4-5-20251101"`
11591159
1160 - `"claude-opus-4-5"`
1160 Powerful intelligence for long-running agents and coding
11611161
1162 Powerful intelligence for long-running agents and coding
1162 - `"claude-sonnet-4-5"`
11631163
1164 - `"claude-opus-4-5-20251101"`
1164 High-performance model for agents and coding
11651165
1166 Powerful intelligence for long-running agents and coding
1166 - `"claude-sonnet-4-5-20250929"`
11671167
1168 - `"claude-sonnet-4-5"`
1168 High-performance model for agents and coding
11691169
1170 High-performance model for agents and coding
1170 - `"claude-mythos-preview"`
11711171
1172 - `"claude-sonnet-4-5-20250929"`
1172 **Deprecated**: Will reach end-of-life on June 30, 2026. Please migrate to claude-mythos-5. Visit https://docs.anthropic.com/en/docs/resources/model-deprecations for more information.
11731173
1174 High-performance model for agents and coding
1174 New class of intelligence, strongest in coding and cybersecurity
11751175
1176 - `"claude-mythos-preview"`
1177
1178 **Deprecated**: Will reach end-of-life on June 30, 2026. Please migrate to claude-mythos-5. Visit https://docs.anthropic.com/en/docs/resources/model-deprecations for more information.
1179
1180 New class of intelligence, strongest in coding and cybersecurity
1181
11821176 - `string`
11831177
11841178 - `cache_control: optional CacheControlEphemeral or null`
from line 4722
47284722
47294723 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
47304724
4731 - `"claude-sonnet-5-5" or "claude-fable-5-1" or "claude-opus-5-5" or 16 more`
4725 - `"claude-sonnet-5-5"`
47324726
4733 The model that will complete your prompt.
4727 Efficient model for coding and agents
47344728
4735 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
4729 - `"claude-fable-5-1"`
47364730
4737 - `"claude-sonnet-5-5"`
4731 Frontier intelligence for ambitious tasks across coding, scientific discovery, and enterprise workflows
47384732
4739 Efficient model for coding and agents
4733 - `"claude-opus-5-5"`
47404734
4741 - `"claude-fable-5-1"`
4735 Powerful intelligence for coding, knowledge work, and long-running agents
47424736
4743 Frontier intelligence for ambitious tasks across coding, scientific discovery, and enterprise workflows
4737 - `"claude-mythos-5-1"`
47444738
4745 - `"claude-opus-5-5"`
4739 Our most capable model for cybersecurity and biology research, available through trusted access programs
47464740
4747 Powerful intelligence for coding, knowledge work, and long-running agents
4741 - `"claude-sonnet-5"`
47484742
4749 - `"claude-mythos-5-1"`
4743 Efficient model for coding and agents
47504744
4751 Our most capable model for cybersecurity and biology research, available through trusted access programs
4745 - `"claude-fable-5"`
47524746
4753 - `"claude-sonnet-5"`
4747 Next generation of intelligence for the hardest knowledge work and coding problems
47544748
4755 Efficient model for coding and agents
4749 - `"claude-mythos-5"`
47564750
4757 - `"claude-fable-5"`
4751 Most capable model for cybersecurity and biology research
47584752
4759 Next generation of intelligence for the hardest knowledge work and coding problems
4753 - `"claude-opus-5"`
47604754
4761 - `"claude-mythos-5"`
4755 Powerful intelligence for long-running agents and coding
47624756
4763 Most capable model for cybersecurity and biology research
4757 - `"claude-opus-4-8"`
47644758
4765 - `"claude-opus-5"`
4759 Powerful intelligence for long-running agents and coding
47664760
4767 Powerful intelligence for long-running agents and coding
4761 - `"claude-opus-4-7"`
47684762
4769 - `"claude-opus-4-8"`
4763 Powerful intelligence for long-running agents and coding
47704764
4771 Powerful intelligence for long-running agents and coding
4765 - `"claude-opus-4-6"`
47724766
4773 - `"claude-opus-4-7"`
4767 Powerful intelligence for long-running agents and coding
47744768
4775 Powerful intelligence for long-running agents and coding
4769 - `"claude-sonnet-4-6"`
47764770
4777 - `"claude-opus-4-6"`
4771 Best combination of speed and intelligence
47784772
4779 Powerful intelligence for long-running agents and coding
4773 - `"claude-haiku-4-5"`
47804774
4781 - `"claude-sonnet-4-6"`
4775 Fastest model with near-frontier intelligence
47824776
4783 Best combination of speed and intelligence
4777 - `"claude-haiku-4-5-20251001"`
47844778
4785 - `"claude-haiku-4-5"`
4779 Fastest model with near-frontier intelligence
47864780
4787 Fastest model with near-frontier intelligence
4781 - `"claude-opus-4-5"`
47884782
4789 - `"claude-haiku-4-5-20251001"`
4783 Powerful intelligence for long-running agents and coding
47904784
4791 Fastest model with near-frontier intelligence
4785 - `"claude-opus-4-5-20251101"`
47924786
4793 - `"claude-opus-4-5"`
4787 Powerful intelligence for long-running agents and coding
47944788
4795 Powerful intelligence for long-running agents and coding
4789 - `"claude-sonnet-4-5"`
47964790
4797 - `"claude-opus-4-5-20251101"`
4791 High-performance model for agents and coding
47984792
4799 Powerful intelligence for long-running agents and coding
4793 - `"claude-sonnet-4-5-20250929"`
48004794
4801 - `"claude-sonnet-4-5"`
4795 High-performance model for agents and coding
48024796
4803 High-performance model for agents and coding
4797 - `"claude-mythos-preview"`
48044798
4805 - `"claude-sonnet-4-5-20250929"`
4799 **Deprecated**: Will reach end-of-life on June 30, 2026. Please migrate to claude-mythos-5. Visit https://docs.anthropic.com/en/docs/resources/model-deprecations for more information.
48064800
4807 High-performance model for agents and coding
4801 New class of intelligence, strongest in coding and cybersecurity
48084802
4809 - `"claude-mythos-preview"`
4810
4811 **Deprecated**: Will reach end-of-life on June 30, 2026. Please migrate to claude-mythos-5. Visit https://docs.anthropic.com/en/docs/resources/model-deprecations for more information.
4812
4813 New class of intelligence, strongest in coding and cybersecurity
4814
48154803 - `string`
48164804
48174805 - `role: "assistant"`
from line 6231
62436231
62446232 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
62456233
6246 - `"claude-sonnet-5-5" or "claude-fable-5-1" or "claude-opus-5-5" or 16 more`
6234 - `"claude-sonnet-5-5"`
62476235
6248 The model that will complete your prompt.
6236 Efficient model for coding and agents
62496237
6250 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
6238 - `"claude-fable-5-1"`
62516239
6252 - `"claude-sonnet-5-5"`
6240 Frontier intelligence for ambitious tasks across coding, scientific discovery, and enterprise workflows
62536241
6254 Efficient model for coding and agents
6242 - `"claude-opus-5-5"`
62556243
6256 - `"claude-fable-5-1"`
6244 Powerful intelligence for coding, knowledge work, and long-running agents
62576245
6258 Frontier intelligence for ambitious tasks across coding, scientific discovery, and enterprise workflows
6246 - `"claude-mythos-5-1"`
62596247
6260 - `"claude-opus-5-5"`
6248 Our most capable model for cybersecurity and biology research, available through trusted access programs
62616249
6262 Powerful intelligence for coding, knowledge work, and long-running agents
6250 - `"claude-sonnet-5"`
62636251
6264 - `"claude-mythos-5-1"`
6252 Efficient model for coding and agents
62656253
6266 Our most capable model for cybersecurity and biology research, available through trusted access programs
6254 - `"claude-fable-5"`
62676255
6268 - `"claude-sonnet-5"`
6256 Next generation of intelligence for the hardest knowledge work and coding problems
62696257
6270 Efficient model for coding and agents
6258 - `"claude-mythos-5"`
62716259
6272 - `"claude-fable-5"`
6260 Most capable model for cybersecurity and biology research
62736261
6274 Next generation of intelligence for the hardest knowledge work and coding problems
6262 - `"claude-opus-5"`
62756263
6276 - `"claude-mythos-5"`
6264 Powerful intelligence for long-running agents and coding
62776265
6278 Most capable model for cybersecurity and biology research
6266 - `"claude-opus-4-8"`
62796267
6280 - `"claude-opus-5"`
6268 Powerful intelligence for long-running agents and coding
62816269
6282 Powerful intelligence for long-running agents and coding
6270 - `"claude-opus-4-7"`
62836271
6284 - `"claude-opus-4-8"`
6272 Powerful intelligence for long-running agents and coding
62856273
6286 Powerful intelligence for long-running agents and coding
6274 - `"claude-opus-4-6"`
62876275
6288 - `"claude-opus-4-7"`
6276 Powerful intelligence for long-running agents and coding
62896277
6290 Powerful intelligence for long-running agents and coding
6278 - `"claude-sonnet-4-6"`
62916279
6292 - `"claude-opus-4-6"`
6280 Best combination of speed and intelligence
62936281
6294 Powerful intelligence for long-running agents and coding
6282 - `"claude-haiku-4-5"`
62956283
6296 - `"claude-sonnet-4-6"`
6284 Fastest model with near-frontier intelligence
62976285
6298 Best combination of speed and intelligence
6286 - `"claude-haiku-4-5-20251001"`
62996287
6300 - `"claude-haiku-4-5"`
6288 Fastest model with near-frontier intelligence
63016289
6302 Fastest model with near-frontier intelligence
6290 - `"claude-opus-4-5"`
63036291
6304 - `"claude-haiku-4-5-20251001"`
6292 Powerful intelligence for long-running agents and coding
63056293
6306 Fastest model with near-frontier intelligence
6294 - `"claude-opus-4-5-20251101"`
63076295
6308 - `"claude-opus-4-5"`
6296 Powerful intelligence for long-running agents and coding
63096297
6310 Powerful intelligence for long-running agents and coding
6298 - `"claude-sonnet-4-5"`
63116299
6312 - `"claude-opus-4-5-20251101"`
6300 High-performance model for agents and coding
63136301
6314 Powerful intelligence for long-running agents and coding
6302 - `"claude-sonnet-4-5-20250929"`
63156303
6316 - `"claude-sonnet-4-5"`
6304 High-performance model for agents and coding
63176305
6318 High-performance model for agents and coding
6306 - `"claude-mythos-preview"`
63196307
6320 - `"claude-sonnet-4-5-20250929"`
6308 **Deprecated**: Will reach end-of-life on June 30, 2026. Please migrate to claude-mythos-5. Visit https://docs.anthropic.com/en/docs/resources/model-deprecations for more information.
63216309
6322 High-performance model for agents and coding
6310 New class of intelligence, strongest in coding and cybersecurity
63236311
6324 - `"claude-mythos-preview"`
6325
6326 **Deprecated**: Will reach end-of-life on June 30, 2026. Please migrate to claude-mythos-5. Visit https://docs.anthropic.com/en/docs/resources/model-deprecations for more information.
6327
6328 New class of intelligence, strongest in coding and cybersecurity
6329
63306312 - `string`
63316313
63326314 - `role: "assistant"`
from line 7512
75307512
75317513 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
75327514
7533 - `"claude-sonnet-5-5" or "claude-fable-5-1" or "claude-opus-5-5" or 16 more`
7515 - `"claude-sonnet-5-5"`
75347516
7535 The model that will complete your prompt.
7517 Efficient model for coding and agents
75367518
7537 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
7519 - `"claude-fable-5-1"`
75387520
7539 - `"claude-sonnet-5-5"`
7521 Frontier intelligence for ambitious tasks across coding, scientific discovery, and enterprise workflows
75407522
7541 Efficient model for coding and agents
7523 - `"claude-opus-5-5"`
75427524
7543 - `"claude-fable-5-1"`
7525 Powerful intelligence for coding, knowledge work, and long-running agents
75447526
7545 Frontier intelligence for ambitious tasks across coding, scientific discovery, and enterprise workflows
7527 - `"claude-mythos-5-1"`
75467528
7547 - `"claude-opus-5-5"`
7529 Our most capable model for cybersecurity and biology research, available through trusted access programs
75487530
7549 Powerful intelligence for coding, knowledge work, and long-running agents
7531 - `"claude-sonnet-5"`
75507532
7551 - `"claude-mythos-5-1"`
7533 Efficient model for coding and agents
75527534
7553 Our most capable model for cybersecurity and biology research, available through trusted access programs
7535 - `"claude-fable-5"`
75547536
7555 - `"claude-sonnet-5"`
7537 Next generation of intelligence for the hardest knowledge work and coding problems
75567538
7557 Efficient model for coding and agents
7539 - `"claude-mythos-5"`
75587540
7559 - `"claude-fable-5"`
7541 Most capable model for cybersecurity and biology research
75607542
7561 Next generation of intelligence for the hardest knowledge work and coding problems
7543 - `"claude-opus-5"`
75627544
7563 - `"claude-mythos-5"`
7545 Powerful intelligence for long-running agents and coding
75647546
7565 Most capable model for cybersecurity and biology research
7547 - `"claude-opus-4-8"`
75667548
7567 - `"claude-opus-5"`
7549 Powerful intelligence for long-running agents and coding
75687550
7569 Powerful intelligence for long-running agents and coding
7551 - `"claude-opus-4-7"`
75707552
7571 - `"claude-opus-4-8"`
7553 Powerful intelligence for long-running agents and coding
75727554
7573 Powerful intelligence for long-running agents and coding
7555 - `"claude-opus-4-6"`
75747556
7575 - `"claude-opus-4-7"`
7557 Powerful intelligence for long-running agents and coding
75767558
7577 Powerful intelligence for long-running agents and coding
7559 - `"claude-sonnet-4-6"`
75787560
7579 - `"claude-opus-4-6"`
7561 Best combination of speed and intelligence
75807562
7581 Powerful intelligence for long-running agents and coding
7563 - `"claude-haiku-4-5"`
75827564
7583 - `"claude-sonnet-4-6"`
7565 Fastest model with near-frontier intelligence
75847566
7585 Best combination of speed and intelligence
7567 - `"claude-haiku-4-5-20251001"`
75867568
7587 - `"claude-haiku-4-5"`
7569 Fastest model with near-frontier intelligence
75887570
7589 Fastest model with near-frontier intelligence
7571 - `"claude-opus-4-5"`
75907572
7591 - `"claude-haiku-4-5-20251001"`
7573 Powerful intelligence for long-running agents and coding
75927574
7593 Fastest model with near-frontier intelligence
7575 - `"claude-opus-4-5-20251101"`
75947576
7595 - `"claude-opus-4-5"`
7577 Powerful intelligence for long-running agents and coding
75967578
7597 Powerful intelligence for long-running agents and coding
7579 - `"claude-sonnet-4-5"`
75987580
7599 - `"claude-opus-4-5-20251101"`
7581 High-performance model for agents and coding
76007582
7601 Powerful intelligence for long-running agents and coding
7583 - `"claude-sonnet-4-5-20250929"`
76027584
7603 - `"claude-sonnet-4-5"`
7585 High-performance model for agents and coding
76047586
7605 High-performance model for agents and coding
7587 - `"claude-mythos-preview"`
76067588
7607 - `"claude-sonnet-4-5-20250929"`
7589 **Deprecated**: Will reach end-of-life on June 30, 2026. Please migrate to claude-mythos-5. Visit https://docs.anthropic.com/en/docs/resources/model-deprecations for more information.
76087590
7609 High-performance model for agents and coding
7591 New class of intelligence, strongest in coding and cybersecurity
76107592
7611 - `"claude-mythos-preview"`
7612
7613 **Deprecated**: Will reach end-of-life on June 30, 2026. Please migrate to claude-mythos-5. Visit https://docs.anthropic.com/en/docs/resources/model-deprecations for more information.
7614
7615 New class of intelligence, strongest in coding and cybersecurity
7616
76177593 - `string`
76187594
76197595 - `role: "assistant"`
from line 8695
87198695
87208696 - `cache_missed_input_tokens: number`
87218697
8722 Approximate number of input tokens that would have been read from cache had the prefix matched the previo
8698 Approximate number of input tokens that would have been read from cache had the prefix matched the previous request.
8699
8700 - `CacheMissSystemChanged object`
8701
8702 - `type: "system_changed"`
8703
8704 default: system_changed
8705
8706 - `cache_missed_input_tokens: number`
8707
8708 Approximate number of input tokens that would have been read from cache had the prefix matched the previous request.
8709
8710 - `CacheMissToolsChanged object`
8711
8712 - `type: "tools_changed"`
8713
8714 default: tools_changed
8715
8716 - `cache_missed_input_tokens: number`
8717
8718 Approximate number of input tokens that would have been read from cache had the prefix matched the previous request.
8719
8720 - `CacheMissMessagesChanged object`
8721
8722 - `type: "messages_changed"`
8723
8724 default: messages_changed
8725
8726 - `cache_missed_input_tokens: number`
8727
8728 Approximate number of input tokens that would have been read from cache had the prefix matched the previous request.
8729
8730 - `CacheMissPreviousMessageNotFound object`
8731
8732 - `type: "previous_message_not_found"`
8733
8734 default: previous_message_not_found
8735
8736 - `CacheMissUnavailable object`
8737
8738 - `type: "unavailable"`
8739
8740 default: unavailable
8741
8742 - `model: Model`
8743
8744 The model that will complete your prompt.
8745
8746 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional
No line in this hunk matches that.