Create a Text Completion changedapi/completions/create
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Lines+168added
Lines−160removed
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143
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14 Aug 2026
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Recorded edits14to this page, all time
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143143
144144 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
145145
146 - `string`
146 - `"claude-sonnet-5-5" or "claude-fable-5-1" or "claude-opus-5-5" or 16 more`
147147
148 - `"claude-fable-5-1" or "claude-opus-5-5" or "claude-mythos-5-1" or 15 more`
149
150148 The model that will complete your prompt.
151149
152150 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
153151
152 - `"claude-sonnet-5-5"`
153
154 Efficient model for coding and agents
155
154156 - `"claude-fable-5-1"`
155157
156158 Frontier intelligence for ambitious tasks across coding, scientific discovery, and enterprise workflows
from line 167
165167
166168 - `"claude-sonnet-5"`
167169
168 High-performance model for coding and agents
170 Efficient model for coding and agents
169171
170172 - `"claude-fable-5"`
171173
from line 227
225227
226228 New class of intelligence, strongest in coding and cybersecurity
227229
230 - `string`
231
228232- `prompt: string`
229233
230234 The prompt that you want Claude to complete.
from line 341
337341
338342 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
339343
340 - `string`
344 - `"claude-sonnet-5-5" or "claude-fable-5-1" or "claude-opus-5-5" or 16 more`
341345
342 - `"claude-fable-5-1" or "claude-opus-5-5" or "claude-mythos-5-1" or 15 more`
343
344346 The model that will complete your prompt.
345347
346348 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
347349
350 - `"claude-sonnet-5-5"`
351
352 Efficient model for coding and agents
353
348354 - `"claude-fable-5-1"`
349355
350356 Frontier intelligence for ambitious tasks across coding, scientific discovery, and enterprise workflows
from line 365
359365
360366 - `"claude-sonnet-5"`
361367
362 High-performance model for coding and agents
368 Efficient model for coding and agents
363369
364370 - `"claude-fable-5"`
365371
from line 424
418424 **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.
419425
420426 New class of intelligence, strongest in coding and cybersecurity
427
428 - `string`
421429
422430 - `stop_reason: string or null`
423431
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