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Set Sonnet 5 reasoning effort to low #705

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Set Sonnet 5 reasoning effort to low #705

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1 change: 1 addition & 0 deletions ModelConfiguration/anthropic-claude-sonnet-5.json
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Expand Up @@ -2,6 +2,7 @@
"data": {
"type": "card",
"attributes": {
"reasoningEffort": "low",

@claude claude Bot Sep 3, 2026

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Fix is scoped to Sonnet 5 only, but the realm default is Sonnet 4.6.

SystemCard/default.json sets defaultModelConfiguration to ../ModelConfiguration/anthropic-claude-sonnet-46, and that card (like anthropic-claude-fable-5.json, anthropic-claude-opus-48.json, anthropic-claude-opus-47.json) still has no reasoningEffort in its attributes. If those models also think by default, the exact symptom this PR is fixing — minutes on the thinking placeholder, or a generation that exhausts the output-token budget on reasoning — still reproduces for every user who never changes models, since they land on Sonnet 4.6.

Worth either extending the same reasoningEffort to the other thinking-by-default Anthropic cards in this PR, or noting in the description why Sonnet 5 is the only one that needs it.

Separately, a nit on the PR description: it says the card's auto title gains the ・Thinking suffix. It won't — cardTitle in system-card/model-configuration.gts computes this.cardInfo?.name || autoTitle, and this card has cardInfo.name set to "Anthropic: Claude Sonnet 5", so the explicit name wins and the suffix is never rendered. The 💡 rightBadge change is real.

Generated by Claude Code

"cardInfo": {
"name": "Anthropic: Claude Sonnet 5",
"summary": null,
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