Feature matrix
What each model supports, which request parameters it rejects, and its limits, as each company publishes them. A dash means the company doesn't publish it, not that the model lacks it.
| Model | Structured outputs | Function calling | Prompt caching | Batch API | Image input | PDF input | Reasoning / thinking | Fine-tuning | Built-in web search | temperature | top_p | logprobs | Context window | Max output tokens |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Anthropic Claude Fable 5claude-fable-5 | —Not published | —Not published | Supported | Supported | Supported | —Not published | Supported (thinking: adaptive, always on; default effort: high) | —Not published | —Not published | —Not published | —Not published | —Not published | 1M | 128K |
| Anthropic Claude Fable 5.1claude-fable-5-1 | —Not published | —Not published | Supported | Supported | Supported | —Not published | Supported (thinking: adaptive, always on; default effort: high) | —Not published | —Not published | —Not published | —Not published | —Not published | 1M | 128K |
| Anthropic Claude Haiku 4.5claude-haiku-4-5-20251001 | —Not published | —Not published | Supported | Supported | Supported | —Not published | Supported (thinking: extended; effort: not supported) | —Not published | —Not published | —Not published | —Not published | —Not published | 200K | 64K |
| Anthropic Claude Haiku 5.5claude-haiku-5-5 | —Not published | —Not published | Supported | Supported | Supported | —Not published | Supported (thinking: adaptive; default effort: medium) | —Not published | —Not published | Rejected (non-default value returns a 400 error) | Rejected (non-default value returns a 400 error) | —Not published | 1M | 128K |
| Anthropic Claude Mythos 5claude-mythos-5 | —Not published | —Not published | Supported | Supported | Supported | —Not published | Supported (thinking: adaptive, always on; default effort: high) | —Not published | —Not published | —Not published | —Not published | —Not published | 1M | 128K |
| Anthropic Claude Mythos 5.1claude-mythos-5-1 | —Not published | —Not published | Supported | Supported | Supported | —Not published | Supported (thinking: adaptive, always on; default effort: high) | —Not published | —Not published | —Not published | —Not published | —Not published | 1M | 128K |
| Anthropic Claude Opus 4.5claude-opus-4-5-20251101 | —Not published | —Not published | Supported | Supported | Supported | —Not published | Supported (thinking: extended; default effort: high) | —Not published | —Not published | —Not published | —Not published | —Not published | 200K | 64K |
| Anthropic Claude Opus 4.6claude-opus-4-6 | —Not published | —Not published | Supported | Supported | Supported | —Not published | Supported (thinking: adaptive, extended deprecated; default effort: high) | —Not published | —Not published | —Not published | —Not published | —Not published | 1M | 128K |
| Anthropic Claude Opus 4.7claude-opus-4-7 | —Not published | —Not published | Supported | Supported | Supported | —Not published | Supported (thinking: adaptive; default effort: high) | —Not published | —Not published | —Not published | —Not published | —Not published | 1M | 128K |
| Anthropic Claude Opus 4.8claude-opus-4-8 | —Not published | —Not published | Supported | Supported | Supported | —Not published | Supported (thinking: adaptive; default effort: high) | —Not published | —Not published | —Not published | —Not published | —Not published | 1M | 128K |
| Anthropic Claude Opus 5claude-opus-5 | —Not published | —Not published | Supported | Supported | Supported | —Not published | Supported (thinking: adaptive; default effort: high) | —Not published | —Not published | —Not published | —Not published | —Not published | 1M | 128K |
| Anthropic Claude Opus 5.5claude-opus-5-5 | —Not published | —Not published | Supported | Supported | Supported | —Not published | Supported (thinking: adaptive, always on; default effort: medium) | —Not published | —Not published | —Not published | —Not published | —Not published | 1M | 128K |
| Anthropic Claude Sonnet 4.5claude-sonnet-4-5-20250929 | —Not published | —Not published | Supported | Supported | Supported | —Not published | Supported (thinking: extended; effort: not supported) | —Not published | —Not published | —Not published | —Not published | —Not published | 200K | 64K |
| Anthropic Claude Sonnet 4.6claude-sonnet-4-6 | —Not published | —Not published | Supported | Supported | Supported | —Not published | Supported (thinking: adaptive, extended deprecated; default effort: high) | —Not published | —Not published | —Not published | —Not published | —Not published | 1M | 128K |
| Anthropic Claude Sonnet 5claude-sonnet-5 | —Not published | —Not published | Supported | Supported | Supported | —Not published | Supported (thinking: adaptive; default effort: high) | —Not published | —Not published | Rejected | Rejected | —Not published | 1M | 128K |
| Anthropic Claude Sonnet 5.5claude-sonnet-5-5 | —Not published | —Not published | Supported | Supported | Supported | —Not published | Supported (thinking: adaptive; default effort: high) | —Not published | —Not published | Rejected | Rejected | —Not published | 1M | 128K |
Filled square: supported or accepted. Half-filled: partial or ignored. Hollow: not supported or rejected. Dash: not published. Open a feature for its full list and history.