Models overview changedmodels/overview
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7272Each model in the response also has a `line` field, which names the model line it belongs to. Claude Opus 4.5 and Claude Opus 4.6 both report `opus`. Use `line` to group models, for example, in a model picker. `line` is `null` when a model belongs to no line. Read `line` instead of inferring it from the model's `id`. Anthropic might add more lines, so don't treat the set of values as fixed.
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74Each model's `capabilities` object includes `thinking.types.disabled`, which reports whether the model accepts `thinking: {type: "disabled"}`, the setting that [turns thinking off](https://platform.claude.com/docs/en/build-with-claude/thinking#turning-thinking-off). `supported` is `false` when the model rejects `"disabled"` with a 400 error, and `true` on a model that doesn't support thinking. Even when `supported` is `true`, the API can still reject a `"disabled"` request for another reason. One such reason is an [effort](https://platform.claude.com/docs/en/build-with-claude/effort) level that the model doesn't allow with thinking off.
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7476## Prompt and output performance
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7678Current Claude models excel in:
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