GPT-5.2 vs Gemini 3 Pro: Which is Better in 2026?
GPT-5.2 and Gemini 3 Pro are flagship models from the two largest AI labs — but Gemini 3 Pro is deprecated March 9, 2026 and superseded by Gemini 3.1 Pro at the same price. If you're comparing these models for a new project, Gemini 3.1 Pro is the current comparison point. For the matchup itself: each model has clear strengths, and the gaps have narrowed considerably since 2025.
Last updated: February 2026
Our Pick
GPT-5.2
GPT-5.2 wins on raw capability, developer ecosystem, and versatility. It scores higher on independent benchmarks, has a 1% hallucination rate (vs Gemini 3 Pro's 88% without grounding), and has the deepest integration ecosystem of any model. Gemini 3 Pro wins on context window (1M vs 400K tokens) and Google Workspace integration. The March 9, 2026 deprecation date means any new project on Gemini 3 Pro will need to migrate to 3.1 Pro shortly after launch — factor that into the decision.
Try GPT-5.2At a glance
| Feature | GPT-5.2 | Gemini 3 Pro |
|---|---|---|
| Rating | 7.5 / 10 | 7.8 / 10 |
| Provider | OpenAI | |
| Context window | 400K tokens | 1M tokens |
| Input (per 1M tokens) | $1.75 | $2 |
| Output (per 1M tokens) | $14 | $12 |
| Multimodal | Yes | Yes |
| Open source | No | No |
Use case breakdown
GPT-5.2 scores higher across most independent benchmarks. 100% on AIME 2025 math.
Gemini's 1M context window more than doubles GPT-5.2's 400K.
More developer integrations, better IDE tooling, deeper ecosystem.
Both are roughly comparable at input pricing. Gemini output at $12/1M is cheaper than GPT-5.2's $14/1M.
Gemini has native video understanding. GPT-5.2 handles images but video is more limited.
Gemini is native in Gmail, Docs, Sheets. ChatGPT requires external integrations.
Gemini 3 Pro is deprecated March 9, 2026. GPT-5.2 has no announced deprecation date. New projects that start on Gemini 3 Pro will need to migrate within weeks.
FAQ
Is GPT-5.2 or Gemini 3 Pro better in 2026?
GPT-5.2 scores higher on most benchmarks, has the better developer ecosystem, and a far lower hallucination rate (1% with browsing vs 88% for Gemini 3 Pro without Search grounding). Gemini 3 Pro wins on context window (1M tokens) and Google Workspace integration. It is also deprecated March 9, 2026 — Gemini 3.1 Pro is the current Google flagship at the same price.
Which has a better free plan — GPT-5.2 or Gemini 3 Pro?
Both have free consumer tiers, but with different models. ChatGPT's free tier uses GPT-5.2 with daily limits. The free Google consumer product at gemini.google.com runs Gemini Flash — not Gemini 3 Pro. Gemini 3 Pro requires the AI Pro plan ($19.99/month).
Is Gemini 3 Pro cheaper than GPT-5.2?
Input pricing is comparable ($2 vs $1.75/1M). Gemini 3 Pro output is slightly cheaper ($12 vs $14/1M). Neither is dramatically cheaper. Note that Gemini 3 Pro is deprecated March 9, 2026 — the migration to Gemini 3.1 Pro carries the same pricing.