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Anthropic (Claude)

Uses SSE streaming. Tool calls arrive as tool_use content blocks. Best for: Complex reasoning, detailed instruction following, nuanced tool use, computer-use (screen interaction).
Anthropic is the only provider that supports computer-use (screen interaction). If you need Wolffish to drive a browser or desktop UI, you need an Anthropic key.

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Getting an API Key

  1. Go to console.anthropic.com
  2. Sign up or log in
  3. Navigate to API Keys and create a new key
  4. Paste it into Wolffish → Settings → Models → Anthropic

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Models

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Reasoning modes

How this model reasons is set in the model card beside the chat input — hover the model switch to preview the card, click to pin it open. The top chip row, labelled Thinking, is the control: pick a chip and it applies from your next message. Two separate ideas combine here:

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Thinking — whether the model reasons

  • Off — the model answers immediately. Fastest and cheapest; ideal for simple, direct tasks.
  • On (the chip reads Normal) — the model first works through the problem in a dedicated reasoning pass before replying. Slower and uses more tokens, but markedly more accurate on multi-step, logical, or ambiguous tasks.

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Effort — how hard it thinks

Only effort-capable models expose this; it applies once thinking is on.
  • High — standard reasoning depth. The right default for most agentic work.
  • Max — the model reasons longer and deeper for the hardest problems. More tokens and latency in exchange for higher quality on complex work.

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The chip row

The active chip is tinted; the rest sit quiet. Each model shows only the chips it genuinely supports — a model that always reasons has no Off, a model with a single mode shows that one chip inert, and a model that can’t reason at all replaces the row with “Reasoning is not supported by this model.” Wolffish remembers your choice per model. (Before v1.0.236 this was a colour-coded brain button on the composer; it moved into the model card, beside the Single/Workflow row, so every model knob sits in one panel.) On Anthropic: Opus, Sonnet and Fable models support Off / High / Max; Haiku supports Off / High. On the newest models (Opus 4-8 and 4-7) thinking is adaptive — the model chooses its own depth — and Anthropic does not return the reasoning text; 4-6 and earlier stream their reasoning.
All models support tool calling with no hard tool-count limit. Anthropic uses ephemeral prefix caching for cost savings on repeated context.