Create a Text Completion changedapi/completions/create
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Lines−70removed
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143
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Recorded edits13to 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`
147
146148 - `"claude-fable-5-1" or "claude-opus-5-5" or "claude-mythos-5-1" or 15 more`
147149
148150 The model that will complete your prompt.
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185187
186188 Powerful intelligence for long-running agents and coding
187189
188 - `"claude-mythos-preview"`
189
190 New class of intelligence, strongest in coding and cybersecurity
191
192190 - `"claude-opus-4-6"`
193191
194192 Powerful intelligence for long-running agents and coding
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221219
222220 High-performance model for agents and coding
223221
224 - `string`
222 - `"claude-mythos-preview"`
225223
224 **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.
225
226 New class of intelligence, strongest in coding and cybersecurity
227
226228- `prompt: string`
227229
228230 The prompt that you want Claude to complete.
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281283
282284 Note that even with `temperature` of `0.0`, the results will not be fully deterministic.
283285
284 maximum: 1, minimum: 0
286 minimum: 0, maximum: 1
285287
286288- `top_k: optional number`
287289
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305307
306308 Recommended for advanced use cases only.
307309
308 maximum: 1, minimum: 0
310 minimum: 0, maximum: 1
309311
310312## Returns
311313
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335337
336338 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
337339
340 - `string`
341
338342 - `"claude-fable-5-1" or "claude-opus-5-5" or "claude-mythos-5-1" or 15 more`
339343
340344 The model that will complete your prompt.
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377381
378382 Powerful intelligence for long-running agents and coding
379383
380 - `"claude-mythos-preview"`
381
382 New class of intelligence, strongest in coding and cybersecurity
383
384384 - `"claude-opus-4-6"`
385385
386386 Powerful intelligence for long-running agents and coding
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413413
414414 High-performance model for agents and coding
415415
416 - `string`
416 - `"claude-mythos-preview"`
417
418 **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.
419
420 New class of intelligence, strongest in coding and cybersecurity
417421
418422 - `stop_reason: string or null`
419423
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