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Use Gemini with Claude Code

$2/Mtok in

Claude Code's agent loop with Gemini's million-token context: point the harness at a model that can hold your whole repo in one window. The messages translation layer makes non-Anthropic models a --model flag, not a different tool.

Get a key — free starter creditsGemini 3.1 Pro API details

Facts

At a glance

Model

Gemini 3.1 Pro

google/gemini-3-1-pro

Price

$2 / M input · $8 / M output

Context window

1,000k tokens

Tool

Claude Code

Setup below — under two minutes

Quickstart

Set up Gemini in Claude Code

  1. 1

    Point Claude Code at CompanyFabric:

    export ANTHROPIC_BASE_URL="https://api.companyfabric.com"
export ANTHROPIC_API_KEY="$COMPANYFABRIC_API_KEY"
  2. 2

    Start a session on this model:

    claude --model google/gemini-3-1-pro
  3. 3

    Every turn's exact cost lands in your dashboard usage feed — set a per-key budget cap if the agent runs unattended.

Full tool guide: Use any model with Claude Code →

FAQ

Frequently asked questions

Do I need a Google account to use Gemini in Claude Code?

No — one CompanyFabric key covers Gemini 3.1 Pro and every other model in the library. Billing is one prepaid balance with exact per-call metering; BYOK at 0% is available if you already have provider keys.

What does Gemini 3.1 Pro cost in Claude Code?

$2 / M input · $8 / M output — the same metered price as any other route to the model. Set a per-key budget cap to bound what the tool can spend.

Can I switch models later without touching Claude Code again?

Yes — the endpoint stays the same; the model is a string. Any catalog id works in the same configuration, including cheaper tiers for bulk work.

Why run Gemini inside Claude Code instead of Gemini CLI?

Harness maturity — if your team already lives in Claude Code (hooks, MCP servers, workflows), switching the brain is one flag; switching the harness is a migration.

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One key. Every model. Exact prices.

Run Gemini in Claude Code with free starter credits. Free starter credits included — no subscription required.

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