feat(providers): add Claude Opus 4.8 model

[waleedlatif1]

Summary

• Add claude-opus-4-8 to Anthropic provider models with $5/$0.50/$25 pricing, 1M context, 128k max output, adaptive thinking (effort: low/medium/high/xhigh/max, default high), and nativeStructuredOutputs
• Swap recommended: true from Opus 4.7 to Opus 4.8 (new flagship per Anthropic docs)
• Extend supportsAdaptiveThinking() in anthropic/core.ts to match opus-4-8 — without this the request would route to budget_tokens, which the Opus 4.8 API rejects with a 400

Type of Change

• New feature

Testing

Tested manually

Checklist

• Code follows project style guidelines
• Self-reviewed my changes
• Tests added/updated and passing
• No new warnings introduced
• I confirm that I have read and agree to the terms outlined in the Contributor License Agreement (CLA)

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Project	Deployment	Actions	Updated (UTC)
docs	Skipped		May 28, 2026 6:13pm

[cursor]

PR Summary

Medium Risk
Incorrect thinking payload routing would cause 400s for Opus 4.8 runs; the change is small but sits on the Anthropic request path.

Overview
Adds claude-opus-4-8 to the Anthropic model catalog (pricing, 1M context, 128k max output, adaptive thinking levels including xhigh/max, native structured outputs) and marks it as the recommended Opus flagship instead of 4.7.

Updates supportsAdaptiveThinking() in anthropic/core.ts so Opus 4.8 uses adaptive thinking with effort—not budget_tokens extended thinking, which the API rejects with a 400.

^{Reviewed by Cursor Bugbot for commit 1183424. Configure here.}

[greptile-apps]

Greptile Summary

This PR adds claude-opus-4-8 as a new Anthropic provider model and promotes it to recommended, replacing Opus 4.7. It also extends supportsAdaptiveThinking() in core.ts to recognise the new model so it routes to adaptive thinking rather than the unsupported budget_tokens path.

• models.ts: New claude-opus-4-8 entry with $5/$0.5/$25 pricing, 1M context window, 128k max output, adaptive thinking levels [low, medium, high, xhigh, max], and recommended: true; recommended removed from Opus 4.7.
• core.ts: Two new includes checks (opus-4-8 and opus-4.8) added to supportsAdaptiveThinking(), matching the dual-pattern convention used for every other model in the function; JSDoc updated to list Opus 4.8 alongside Opus 4.7.

Confidence Score: 5/5

Safe to merge — adds a new model entry and a two-line guard in a routing function, with no changes to existing paths.

Both changed files are purely additive: the model definition in models.ts follows the exact same shape as Opus 4.7, and the two new pattern checks in supportsAdaptiveThinking() mirror the dual-format convention already used for every other model. No existing behaviour is altered.

No files require special attention.

Important Files Changed

Filename	Overview
apps/sim/providers/anthropic/core.ts	Extends supportsAdaptiveThinking() with dual-pattern checks for opus-4-8/opus-4.8, consistent with existing patterns for other models; JSDoc updated to match.
apps/sim/providers/models.ts	Adds claude-opus-4-8 model entry with $5/$0.5/$25 pricing, 1M context, 128k max output, adaptive thinking levels, and recommended:true; removes recommended from Opus 4.7.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[API Request with modelId] --> B{supportsAdaptiveThinking?}
    B -- "includes opus-4-8 / opus-4.8\nincludes opus-4-7 / opus-4.7\nincludes opus-4-6 / opus-4.6\nincludes sonnet-4-6 / sonnet-4.6" --> C[thinking: adaptive\noutputConfig: effort=level]
    B -- other models --> D{budgetTokens defined?}
    D -- yes --> E[thinking: enabled\nbudget_tokens: N]
    D -- no --> F[return null / no thinking]

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[waleedlatif1]

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[waleedlatif1]

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^{Reviewed by Cursor Bugbot for commit 1183424. Configure here.}