feat(providers): add Gemini 3.8 Flash

[waleedlatif1]

Summary

• Add gemini-3.8-flash to the Google provider catalog and make it the recommended Google model (moved off gemini-3.6-flash)
• Regenerated the agent-block streamed-thinking docs table

Every field was verified against Google's docs and the live Gemini API using a staging key:

Field	Value	Source
id	gemini-3.8-flash	live GET /v1beta/models + API docs
contextWindow	1,048,576	live API inputTokenLimit + OpenRouter
maxOutputTokens	65,536	live API outputTokenLimit + OpenRouter
input	$0.75/M	pricing + OpenRouter
cachedInput	$0.075/M	pricing + OpenRouter cache-read
output	$3.75/M	pricing + OpenRouter
temperature	0–2	live API rejects 2.1 with "must be in the range [0.0, 2.0]"
thinking.levels	low/medium/high	live API: minimal is rejected for this model
releaseDate	2026-09-02	launch post

Two things worth a reviewer's attention:

• minimal is not a valid thinking level here. Every sibling Gemini 3.x Flash entry declares ['minimal','low','medium','high'], but 3.8 Flash returns Thinking level MINIMAL is not supported for this model. Copying the sibling shape would have put a dead option in the agent-block dropdown, so this entry declares only ['low','medium','high'].
• Introductory pricing expires. $0.75/$3.75 is Google's introductory rate through 2026-12-31; it doubles to $1.50/$7.50 on 2027-01-01. Google models are hosted and billed to the workspace, so this entry needs a pricing update before then or we under-bill.

Not included:

• Gemini 3.8 Flash Cyber is not on the public Gemini API — Google gates it to trusted defenders via the Fairwind Program. gemini-3.8-flash-cyber, -preview, and -latest all return "Model is not found for api version v1beta". Adding an entry would put a permanently-failing option in the model dropdown, so it is left out until we have access.
• The sim-auto router pool still pins gemini-3.6-flash for tier-1 image/file tasks. That is a curated routing choice with its own cost/quality tradeoff, so I left it alone rather than swapping it in this PR.

Type of Change

• New feature

Testing

Executed gemini-3.8-flash end-to-end through Sim's own Google provider with a live key:

• plain completion at temperature: 2.0 → correct output
• thinkingLevel low/medium/high all accepted, with thinking budget scaling as expected (37 → 106 → 180 output tokens)
• tool calling → model emitted the expected get_weather call through the provider tool loop
• structured output → returned schema-conforming JSON
• cost calculation resolved against the new pricing entry

Also ran: bun run lint, bun run type-check (clean), bun run check:audits (45/45 pass), bun run agent-stream-docs:check (up to date), and the provider/model-router test suites (256 tests pass).

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)

🤖 Generated with Claude Code

https://claude.ai/code/session_01LKqTj3FNr4iS5jMy1gZe2D

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Project	Deployment	Actions	Updated
docs	Ready	Preview	Sep 2, 2026 6:31pm UTC

[greptile-apps]

Greptile Summary

This PR adds Gemini 3.8 Flash to the Google provider catalog and promotes it as the recommended Google model.

• Defines pricing, context and output limits, temperature range, and supported thinking levels.
• Removes the recommendation marker from Gemini 3.6 Flash.
• Regenerates the streamed-thinking documentation to list Gemini 3.8 Flash under Google summary streaming.

Confidence Score: 5/5

The PR appears safe to merge with no actionable correctness or security issues identified.

The new model metadata conforms to existing provider contracts, supported thinking-level mappings, recommendation consumers, and generated documentation behavior.

Important Files Changed

Filename	Overview
apps/sim/providers/models.ts	Adds internally consistent Gemini 3.8 Flash catalog metadata and transfers the Google recommendation marker from Gemini 3.6 Flash.
apps/docs/content/docs/workflows/blocks/agent.mdx	Updates the generated streamed-thinking table consistently with the new model’s Google summary-streaming behavior.

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[cubic-dev-ai]

No issues found across 2 files

Confidence score: 5/5

• Automated review surfaced no issues in the provided summaries.
• No files require special attention.

_{Re-trigger cubic}