Gemini 3.1 Pro vs GPT-5.2: Which is Better in 2026?
Gemini 3.1 Pro and GPT-5.2 represent Google and OpenAI at their strongest as of February 2026. Gemini 3.1 Pro just took the top spot on the Artificial Analysis Intelligence Index with a score of 57 — 10 points ahead of GPT-5.2's 46.58. But benchmarks don't tell the whole story. Here's where each model wins.
Last updated: February 2026
Our Pick
Gemini 3.1 Pro
Gemini 3.1 Pro wins on intelligence benchmarks, abstract reasoning, agentic performance, context window, and price. GPT-5.2 wins on developer ecosystem, lower latency, and practical writing quality as judged by users. For API-based pipelines, agentic coding, scientific research, or large-document work, Gemini 3.1 Pro is the stronger technical choice. For everyday general-purpose use — especially with IDE integrations, DALL-E, or the broader OpenAI tooling ecosystem — GPT-5.2 remains the most practical and widely supported option.
Try Gemini 3.1 ProAt a glance
| Feature | Gemini 3.1 Pro | GPT-5.2 |
|---|---|---|
| Rating | 9.0 / 10 | 7.4 / 10 |
| Provider | OpenAI | |
| Context window | 1M tokens | 400K tokens |
| Input (per 1M tokens) | $2 | $1.75 |
| Output (per 1M tokens) | $12 | $14 |
| Multimodal | Yes | Yes |
| Open source | No | No |
Use case breakdown
AA Intelligence Index: 57 (Gemini 3.1 Pro) vs 46.58 (GPT-5.2). A 10-point gap is significant — Gemini 3.1 Pro scores higher across 10 independently measured benchmarks.
ARC-AGI-2: 77.1% vs 52.9%. Gemini 3.1 Pro leads by 24 points on the benchmark most resistant to training contamination.
APEX-Agents: 33.5% vs 23.0%. BrowseComp: 85.9% vs 65.8%. MCP Atlas: 69.2% vs 60.6%. Consistent, substantial leads across every agentic benchmark.
1M tokens (Gemini 3.1 Pro) vs 400K (GPT-5.2). More than twice as large. For full codebases, extensive document collections, or long conversations, Gemini 3.1 Pro has a clear structural advantage.
GPT-5.2 powers GitHub Copilot, Cursor, and most IDE integrations. The OpenAI ecosystem has a multi-year head start in tooling, plugins, and enterprise integrations that Gemini has not matched.
In Chatbot Arena blind user voting, GPT-5.2 scores ahead of Gemini 3.1 Pro for general-purpose use. Users prefer GPT-5.2's outputs on open-ended writing, conversation, and everyday tasks.
$4.50/1M blended (Gemini 3.1 Pro, ≤200K) vs $4.81/1M (GPT-5.2 standard mode). Roughly equivalent, but Gemini 3.1 Pro gives you meaningfully more capability per dollar.
Gemini 3.1 Pro has a 29.96s time to first token in reasoning mode — very high for interactive use. GPT-5.2 responds significantly faster. For anything user-facing, GPT-5.2 is more suitable.
FAQ
Is Gemini 3.1 Pro better than GPT-5.2?
On objective benchmarks, yes — Gemini 3.1 Pro leads the Artificial Analysis Intelligence Index (57 vs 46.58) and wins on abstract reasoning, agentic tasks, and context window size. In practice, GPT-5.2 has a better developer ecosystem, lower latency, and stronger user preference scores in blind tests. The right choice depends on your use case.
Which has a larger context window?
Gemini 3.1 Pro: 1,048,576 tokens (roughly 1,500 A4 pages). GPT-5.2: 400,000 tokens. For tasks requiring very large inputs — full codebases, long document sets, extended conversations — Gemini 3.1 Pro fits more than twice as much.
Is Gemini 3.1 Pro cheaper than GPT-5.2?
They are priced similarly. Gemini 3.1 Pro: $2/$12 per 1M tokens (≤200K context), blended $4.50/1M. GPT-5.2: $1.75/$14 per 1M tokens, blended $4.81/1M. For longer contexts, Gemini 3.1 Pro's 2× pricing over 200K can make it more expensive.
Which is better for coding?
Gemini 3.1 Pro leads on competitive coding (LiveCodeBench Pro Elo 2887 vs 2393 for GPT-5.2) and is essentially tied on software engineering tasks (SWE-Bench: 80.6% vs 80.0%). GPT-5.2 wins on developer tooling and IDE integrations. For raw coding capability, Gemini 3.1 Pro is slightly ahead. For practical developer workflows with existing tools, GPT-5.2 is more plug-and-play.
Can I use Gemini 3.1 Pro for free?
Via Google AI Studio, yes — with rate limits (60 req/min). This is a developer tier, not a consumer product. The Gemini App requires a Google One AI Premium subscription ($20/month) for Gemini 3.1 Pro access. GPT-5.2 has a consumer free tier at chatgpt.com (with daily limits).