Completions changedapi/completions
Nearest release: v2.1.258, 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+34added
Lines−4removed
From line
18
where the diff opens
First seen
14 Aug 2026
this site's first read of the page
Recorded edits28to this page, all time
The whole hunk
from line 18, old and new numbered
/
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1818
1919 - `string`
2020
21 - `"message-batches-2024-09-24" or "prompt-caching-2024-07-31" or "computer-use-2024-10-22" or 38 more`
21 - `"message-batches-2024-09-24" or "prompt-caching-2024-07-31" or "computer-use-2024-10-22" or 41 more`
2222
2323 - `"message-batches-2024-09-24"`
2424
from line 102
102102
103103 - `"ce-user-management-2026-07-13"`
104104
105 - `"mid-conversation-output-config-2026-07-01"`
106
107 - `"thinking-binding-controls-2026-08-01"`
108
109 - `"mid-conversation-system-clear-at-2026-08-21"`
110
105111### Body parameters
106112
107113- `max_tokens_to_sample: number`
from line 124
118124
119125 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
120126
121 - `"claude-sonnet-5" or "claude-fable-5" or "claude-mythos-5" or 12 more`
127 - `"claude-fable-5-1" or "claude-mythos-5-1" or "claude-sonnet-5" or 14 more`
122128
123129 The model that will complete your prompt.
124130
125131 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
126132
133 - `"claude-fable-5-1"`
134
135 Frontier intelligence for ambitious tasks across coding, scientific discovery, and enterprise workflows
136
137 - `"claude-mythos-5-1"`
138
139 Our most capable model for cybersecurity and biology research, available through trusted access programs
140
127141 - `"claude-sonnet-5"`
128142
129143 High-performance model for coding and agents
from line 304
290304
291305 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
292306
293 - `"claude-sonnet-5" or "claude-fable-5" or "claude-mythos-5" or 12 more`
307 - `"claude-fable-5-1" or "claude-mythos-5-1" or "claude-sonnet-5" or 14 more`
294308
295309 The model that will complete your prompt.
296310
297311 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
298312
313 - `"claude-fable-5-1"`
314
315 Frontier intelligence for ambitious tasks across coding, scientific discovery, and enterprise workflows
316
317 - `"claude-mythos-5-1"`
318
319 Our most capable model for cybersecurity and biology research, available through trusted access programs
320
299321 - `"claude-sonnet-5"`
300322
301323 High-performance model for coding and agents
from line 451
429451
430452 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
431453
432 - `"claude-sonnet-5" or "claude-fable-5" or "claude-mythos-5" or 12 more`
454 - `"claude-fable-5-1" or "claude-mythos-5-1" or "claude-sonnet-5" or 14 more`
433455
434456 The model that will complete your prompt.
435457
436458 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
459
460 - `"claude-fable-5-1"`
461
462 Frontier intelligence for ambitious tasks across coding, scientific discovery, and enterprise workflows
463
464 - `"claude-mythos-5-1"`
465
466 Our most capable model for cybersecurity and biology research, available through trusted access programs
437467
438468 - `"claude-sonnet-5"`
439469
No line in this hunk matches that.