Completions changedapi/completions
Nearest release: v2.1.284, published 8 hours before 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+252added
Lines−240removed
From line
145
where the diff opens
First seen
14 Aug 2026
this site's first read of the page
Recorded edits14to this page, all time
The whole hunk
from line 145, old and new numbered
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from line 145
145145
146146 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
147147
148 - `string`
148 - `"claude-sonnet-5-5" or "claude-fable-5-1" or "claude-opus-5-5" or 16 more`
149149
150 - `"claude-fable-5-1" or "claude-opus-5-5" or "claude-mythos-5-1" or 15 more`
151
152150 The model that will complete your prompt.
153151
154152 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
155153
154 - `"claude-sonnet-5-5"`
155
156 Efficient model for coding and agents
157
156158 - `"claude-fable-5-1"`
157159
158160 Frontier intelligence for ambitious tasks across coding, scientific discovery, and enterprise workflows
from line 169
167169
168170 - `"claude-sonnet-5"`
169171
170 High-performance model for coding and agents
172 Efficient model for coding and agents
171173
172174 - `"claude-fable-5"`
173175
from line 229
227229
228230 New class of intelligence, strongest in coding and cybersecurity
229231
232 - `string`
233
230234- `prompt: string`
231235
232236 The prompt that you want Claude to complete.
from line 343
339343
340344 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
341345
342 - `string`
346 - `"claude-sonnet-5-5" or "claude-fable-5-1" or "claude-opus-5-5" or 16 more`
343347
344 - `"claude-fable-5-1" or "claude-opus-5-5" or "claude-mythos-5-1" or 15 more`
345
346348 The model that will complete your prompt.
347349
348350 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
349351
352 - `"claude-sonnet-5-5"`
353
354 Efficient model for coding and agents
355
350356 - `"claude-fable-5-1"`
351357
352358 Frontier intelligence for ambitious tasks across coding, scientific discovery, and enterprise workflows
from line 367
361367
362368 - `"claude-sonnet-5"`
363369
364 High-performance model for coding and agents
370 Efficient model for coding and agents
365371
366372 - `"claude-fable-5"`
367373
from line 427
421427
422428 New class of intelligence, strongest in coding and cybersecurity
423429
430 - `string`
431
424432 - `stop_reason: string or null`
425433
426434 The reason that we stopped.
from line 498
490498
491499 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
492500
493 - `string`
501 - `"claude-sonnet-5-5" or "claude-fable-5-1" or "claude-opus-5-5" or 16 more`
494502
495 - `"claude-fable-5-1" or "claude-opus-5-5" or "claude-mythos-5-1" or 15 more`
496
497503 The model that will complete your prompt.
498504
499505 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
500506
507 - `"claude-sonnet-5-5"`
508
509 Efficient model for coding and agents
510
501511 - `"claude-fable-5-1"`
502512
503513 Frontier intelligence for ambitious tasks across coding, scientific discovery, and enterprise workflows
from line 522
512522
513523 - `"claude-sonnet-5"`
514524
515 High-performance model for coding and agents
525 Efficient model for coding and agents
516526
517527 - `"claude-fable-5"`
518528
from line 581
571581 **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.
572582
573583 New class of intelligence, strongest in coding and cybersecurity
584
585 - `string`
574586
575587 - `stop_reason: string or null`
576588
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