Gemini 4 Carbon
Gemini 4 Carbon is an API-only (closed weights) language model from Google, released October 28, 2026. The context window is 1M tokens. On the Epoch Capabilities Index it scores 169.8, rank 2 of 256 rated models. API price: $2 input / $10 output per million tokens.
Today, we’re announcing the next frontier model: Gemini 4 Carbon, our strongest model with state-of-the-art cybersecurity and long horizon capabilities. Carbon ranks #1 on the recently updated v5.0 of Artificial Analysis Intelligence Index at 59.
Check it against your own PC →
Strengths by category
ModelTape's 0–100 fit on Epoch AI benchmark results.
| Category | Score | Based on |
|---|---|---|
| Reasoning | 55.1 | Chess Puzzles, SimpleBench, Mystery Game Puzzles |
| Math | 76.0 | OTIS Mock AIME 2024-2025, FrontierMath-Tiers-1-3-v2-Private, FrontierMath-Tier-4-v2-Private |
| Knowledge | 84.8 | GPQA diamond, SimpleQA Verified |
Benchmark results
| Benchmark (Epoch AI) | Score |
|---|---|
| OTIS Mock AIME | 100.0% |
| GPQA Diamond | 99.3% |
| FrontierMath (Tiers 1–3) | 95.3% |
| FrontierMath-Tier-4-v2-Private | 95.1% |
| SimpleBench | 91.1% |
| EBR-bench | 87.6% |
| SimpleQA Verified | 77.7% |
| Chess Puzzles | 76.9% |
| Mystery Game Puzzles | 70.3% |
| Furniture Assembly | 67.9% |
| FrontierSWE | 61.2% |
Links
Announcement · Epoch AI benchmarks
Models with a similar score
Claude Fable 5.2 · GPT-6 Astra · Claude Opus 5.5 · GPT-6.1 Sol · GPT-6.1 Terra · Claude Fable 5.1 · Claude Sonnet 5.5 · Gemini 4 Argon
More from Google
Gemini 4 Argon · Gemini 3.8 Flash · Gemini 3.7 Flash · Gemini 3.6 Flash · Gemini 3.5 Flash-Lite · Gemini 3.5 Flash Cyber · Gemma 4 E4B · Gemma 4 E2B