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feat: add Claude Sonnet 5.5 pricing, catalog rows and request contract - #6210
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Anthropic released Claude Sonnet 5.5 (claude-sonnet-5-5) on 2026-09-28. Live discovery listed it with no price, no max output and no effort ladder, and its request contract differs from Sonnet 5: thinking disabled/enabled, forced tool_choice and non-default sampling parameters all return 400. - Snapshot rows for anthropic, Bedrock (six ids, regional 1.1x), OpenRouter, Vercel, Kilo, Venice and GitHub Copilot, plus preemptive opencode-zen, ZenMux and Cloudflare rows; all 1M / 128K at 2 / 10 / 0.20 / 2.50. - Anthropic seed and context (also claude-cli), Cursor capability and effort tier, Claude Desktop picker suggestion; preemptive Devin and Kiro rows. - Price overlays for anthropic, anthropic-apikey and cursor (published) and devin/devin-cli (derived). - New src/adapters/anthropic-model-contract.ts: Sonnet 5.5 reasoning none sends between_tools, forced tool choice degrades to auto, temperature/top_p are dropped. The web-search and vision sidecars pick their thinking-off field from it. Verified live against api.anthropic.com. Plan, audit and live evidence: devlog/_plan/260929_sonnet_5_5_catalog/.
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This was referenced Sep 28, 2026
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Post-merge audit found that the new Kiro Sonnet 5.5 row is user-visible despite Kiro currently rejecting the model: Kiro uses a static catalog with liveModels disabled. I opened #6214 to remove only that unsupported route, preserve direct Anthropic/accounting behavior, and add a regression plus architecture note. Focused validation is 210/210 green under capped resources. @lidge-jun @luvs01 please prioritize exact-head review of the corrective PR. |
This was referenced Sep 28, 2026
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…very Claude family (#6217) * docs(devlog): plan Claude contract hardening and PR carries * docs(devlog): fold hardening plan audit * fix(anthropic): apply the live sampling and tool-choice contract to every Claude family A live probe of api.anthropic.com on 2026-09-29 showed the Sonnet 5.5 rules from #6210 were narrower than the upstream contract: - Opus 4.7+, Sonnet 5+ and every Fable return 400 on any non-default temperature/top_p, with or without thinking. The adapter only dropped them when it sent thinking, so a no-reasoning request with temperature failed. - Haiku 4.5, Sonnet 4.5/4.6 and Opus 4.5/4.6 take either field alone but 400 when both are sent; top_p is now dropped when both are present. - Fable 5.1 rejects forced tool_choice like Opus 5.5; it now degrades to auto. - Opus 5.5 and Fable reject both thinking disabled and between_tools, so the web-search and vision sidecars send a low effort and no thinking field for them (verified to end_turn with text inside a 1,024-token budget). Plan, audit and evidence: devlog/_plan/260929_dev_next_hardening_carry/.
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Summary
Anthropic released Claude Sonnet 5.5 (
claude-sonnet-5-5) on 2026-09-28. Live discovery already listsanthropic/claude-sonnet-5-5, but with no price, no max output andsupports_reasoning: false, and nothing outside Anthropic carries it. Its request contract also differs from Sonnet 5, so the adapter sent requests Sonnet 5.5 rejects:claude-sonnet-5-5nonethinking: {type:"disabled"}→ 400thinking: {type:"between_tools"}→ 200temperature/top_psetrequired/ namedany/tool→ 400auto→ 200 (same downgrade as Opus 5.5)Catalog and pricing, all 1M context / 128K output at the Sonnet 5 price ($2 / $10 / $0.20 cache read / $2.50 5m cache write):
anthropic.andglobal.at list,us./eu./jp./au.at 1.1x; OpenRouter, Vercel and Kiloanthropic/claude-sonnet-5.5; Veniceclaude-sonnet-5-5(its published 3.75 / 18.75); GitHub Copilotclaude-sonnet-5-5(GA 2026-09-28).claude-sonnet-5.5, opencode-zen, ZenMuxanthropic/claude-sonnet-5.5, Cloudflareanthropic/claude-sonnet-5-5. Kiro and Devin show the id in their static pickers, so a call can fail upstream until they ship it.The per-family wire rules moved into
src/adapters/anthropic-model-contract.ts, which the web-search and vision sidecars now also use for their thinking-off field, so a sidecar pointed at Sonnet 5.5 sendsbetween_toolsinstead of a rejecteddisabled. Sidecar defaults and Claude Code's native tier map stay onclaude-sonnet-5(installed Claude Code 2.1.283 still sends that id).Known residuals, unchanged here: dotted Bedrock ids (
us.anthropic.claude-sonnet-5-5) do not parse as a Claude family for these rules (true for every family today), and the Messages-native passthrough forwards the caller'sthinkingand sampling fields as sent.Sources: platform.claude.com pricing, models overview, Sonnet 5.5 overview / what's new / migration guide, effort and fast-mode pages; cursor.com/docs/models/claude-sonnet-5-5; GitHub changelog and Copilot pricing; models.dev, OpenRouter, Vercel, Kilo and Venice model APIs; live checks of Devin, Kiro, Command Code, opencode, Opper, ZenMux and Cloudflare catalogs. Plan, audit and live evidence:
devlog/_plan/260929_sonnet_5_5_catalog/.Verification
disabledcontrol all return 200.bun run typecheck,bun run structure:check,bun run privacy:scan: pass.bun teston the 13 touched/regression files (newanthropic-sonnet-5-5-contract.test.ts, anthropic reasoning and tool-choice, usage-cost, cursor catalog, kiro adapter, devin adapter, metadata sync, file-size ratchet, test layout, web-search anthropic, intercept model bindings): 460 pass / 0 fail.bun run test:changed(1428 files) in a/private/tmpcheckout of this commit with isolatedOPENCODEX_HOME/CODEX_HOME: 28689 pass / 19 fail. The 19 are in 7 service, launcher-signal and native-toggle files; run alone, those files give the same 339 pass / 3 fail on this branch and ondev09f8e5ebfe, so none comes from this change. Full cross-platform coverage is left to CI.Checklist