Gemini 3.1 Pro vs Grok Code Fast 1
Benchmarks, API pricing and specs, head to head. Data updated 2026-06-10.
Gemini 3.1 Pro
Google · Mar 2026
Google's flagship with the industry's largest context window — 2M tokens — and frontier multimodal reasoning at $2/$12.
Grok Code Fast 1
xAI · Aug 2025
A speed-first coding model built for agentic IDE loops, popular as a cheap fast tier in Cursor and similar tools.
The verdict
Gemini 3.1 Pro wins 1 of the 1 benchmarks these models share, against 0 for Grok Code Fast 1. On price the gap is dramatic: Grok Code Fast 1 works out roughly 8.6x cheaper per blended million tokens. Gemini 3.1 Pro also takes 2M of context versus 256K for Grok Code Fast 1.
Benchmark head-to-head 1–0
Specs & pricing
| Gemini 3.1 Pro | Grok Code Fast 1 | |
|---|---|---|
| modhub Index | — | — |
| Input price / 1M | $2 | $0.2 |
| Output price / 1M | $12 | $1.5 |
| Context window | 2M | 256K |
| Max output | 66K | — |
| Open weights | no | no |
| Reasoning model | yes | yes |
| Multimodal input | text, image, audio, video | text |
| Knowledge cutoff | Nov 2025 | Aug 2025 |
| Released | Mar 2026 | Aug 2025 |
| Example monthly cost* | $38.00 | $4.25 |
* 10M input + 1.5M output tokens per month at list prices, no caching. Green = better value on that row.
Frequently asked questions
- Which is better, Gemini 3.1 Pro or Grok Code Fast 1?
- Gemini 3.1 Pro wins 1 of the 1 benchmarks these models share, against 0 for Grok Code Fast 1. On price the gap is dramatic: Grok Code Fast 1 works out roughly 8.6x cheaper per blended million tokens. Gemini 3.1 Pro also takes 2M of context versus 256K for Grok Code Fast 1.
- Which is cheaper, Gemini 3.1 Pro or Grok Code Fast 1?
- Gemini 3.1 Pro costs $2/$12 per million input/output tokens, while Grok Code Fast 1 costs $0.2/$1.5. For a typical workload of 10M input and 1.5M output tokens per month, that's $38.00 versus $4.25.
- Which model is better for coding, Gemini 3.1 Pro or Grok Code Fast 1?
- On SWE-bench Verified — the standard agentic-coding benchmark — Gemini 3.1 Pro scores ~78% versus 70.8% for Grok Code Fast 1, making Gemini 3.1 Pro the stronger pick for coding agents.
More comparisons
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