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title: Make Claude Code Opus talk to Gemini Pro | daily.dev
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> ## Documentation Index
> Fetch the complete documentation index at: https://daily.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# Make Claude Code Opus talk to Gemini Pro

**[Pierre](https://daily.dev/sources/0x5ger8743vws6pnvafxr)** · [@pierrebaz](https://daily.dev/pierrebaz) · 3 min read · 13 upvotes · 2 comments

## Summary

Claude Code Opus 4.5 and Gemini 3 Pro each miss things when working independently, but combining them improves decision-making significantly. This guide shows how to integrate Gemini into Claude Code using a bash script that calls the Gemini API and a Claude Code agent that formats prompts and executes the script. The setup involves creating two files in your project's `.claude/` directory: a bash script for API calls and an agent definition that handles consultation requests.

## Content

## Why?

When Claude Code Opus 4.5 works alone it misses things.

When Gemini 3 Pro works alone it misses things.

But when Claude Code asks Gemini critics about highly technical decisions they suddenly get 10x smarter. It's like teleporting in 2028.

## How?

There are 2 ways to connect Claude Code with Gemini:
- MCP server
- Claude Code Agent

Sadly there is no official MCP server for Gemini and I didn't find a serious up-to-date Github repo providing it.

So we gonna use the safe Claude Code agent way:
1. Create a bash script that calls the Google Gemini API
2. Create a Claude Code agent that generate proper prompt for Gemini and execs the bash script

We can then prompt Claude Code with `ask gemini critics about this plan` and it will significantly improve your work, and often save you from unseen edge-cases.

## The code

The following files should be stored in your project root folder in:
```
.claude/
    agents/
        gemini.md
    scripts/
        gemini.sh
```

## The bash script

Stored in `.claude/scripts/gemini.sh`. 
Make it executable with: `chmod +x gemini.sh`.
And store your GEMINI_API_KEY in your bash/zsh profile.

```bash
#!/bin/bash
# Gemini API script for Claude Code agents
# Usage: ./gemini.sh "Your prompt here"
# Requires: GEMINI_API_KEY environment variable

set -e

MODEL="gemini-3-pro-preview"
API_URL="https://generativelanguage.googleapis.com/v1beta/models/${MODEL}:generateContent"

if [ -z "$GEMINI_API_KEY" ]; then
  echo "Error: GEMINI_API_KEY environment variable is not set" >&2
  exit 1
fi

if [ -z "$1" ]; then
  echo "Usage: $0 \"Your prompt here\"" >&2
  exit 1
fi

PROMPT="$1"

response=$(curl -s "${API_URL}?key=${GEMINI_API_KEY}" \
  -H "Content-Type: application/json" \
  -d "{
    \"contents\": [{
      \"parts\": [{
        \"text\": $(echo "$PROMPT" | jq -Rs .)
      }]
    }],
    \"generationConfig\": {
      \"temperature\": 0.7,
      \"maxOutputTokens\": 8192
    }
  }")

# Check for errors
error=$(echo "$response" | jq -r '.error.message // empty')
if [ -n "$error" ]; then
  echo "API Error: $error" >&2
  exit 1
fi

# Extract and print the response text
echo "$response" | jq -r '.candidates[0].content.parts[0].text // "No response"'
```

## The Claude Code agent

Stored in `.claude/agents/gemini.md`. Feel free to tweak the instructions there:

```md
---
name: gemini
description: Consults Gemini 3 Pro for a second opinion on code, architecture, or technical questions
tools:
  - Bash
  - Read
  - Glob
  - Grep
---

You are a Gemini consultant agent. When the user asks you to consult Gemini, get a second opinion, or compare perspectives:

1. Read any relevant code or context the user is asking about
2. Formulate a clear prompt for Gemini
3. Call the Gemini API using the script:

.claude/scripts/gemini.sh "Your prompt here"

4. Summarize Gemini's response and present it to the user

Tips:
- For code review, include the actual code in your prompt
- Be specific in your prompts to get useful responses
- Compare Gemini's perspective with your own analysis when relevant
```

## Community discussion

Top comments from developers on daily.dev.

**@amirakrari** · 1 upvotes

> Thanks for sharing.
> There also is llm counsil plugin you might wanna take a look at

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- [Gemini is catching up to Claude, but it still struggles with the nuance that matters most](https://daily.dev/posts/gemini-is-catching-up-to-claude-but-it-still-struggles-with-the-nuance-that-matters-most-sibpxwkww) · XDA Developers · 0 upvotes · 0 comments

---

Tags: [#llm](https://daily.dev/tags/llm), [#bash](https://daily.dev/tags/bash), [#google-gemini](https://daily.dev/tags/google-gemini), [#claude](https://daily.dev/tags/claude)

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