GPT-5.4 Pro vs Gemini 3.1 Pro Preview
Gemini 3.1 Pro Preview comes out ahead, 68 to 60 on our weighted score, and it is the cheaper option too.
OpenAIGPT-5.4 Pro
60/100- ECI159.1
- Price$30.00 / $180.00
- Context1.05M
- Our pick
GoogleGemini 3.1 Pro Preview
68/100- ECI154.8
- Price$2.00 / $12.00
- Context1.05M
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Gemini 3.1 Pro Preview is our pick
Gemini 3.1 Pro Preview is the better all-round choice, scoring 68/100 against GPT-5.4 Pro (60). It leads on price and inputs & features. GPT-5.4 Pro wins on capability. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%.
- CapabilityGPT-5.4 ProCapabilities Index (ECI): GPT-5.4 Pro 159.1 · Gemini 3.1 Pro Preview 154.8
- Lowest priceGemini 3.1 Pro PreviewGemini 3.1 Pro Preview $4.50 · GPT-5.4 Pro $67.50 per 1M tokens (3:1 blend)
- Longest contextAbout the sameGPT-5.4 Pro 1,050,000 · Gemini 3.1 Pro Preview 1,048,576 tokens
- Widest inputsGemini 3.1 Pro PreviewGPT-5.4 Pro: Text, Images · Gemini 3.1 Pro Preview: Text, Images, PDFs, Audio, Video
- Self-hostingNo open weightsBoth are available only through APIs
| Measure | Weight | GPT-5.4 Pro | Gemini 3.1 Pro Preview |
|---|---|---|---|
| CapabilityCapabilities Index (ECI) | 50% | 90 | 84 |
| Price | 25% | 0 | 19 |
| Inputs & features | 15% | 60 | 100 |
| Context window | 10% | 61 | 61 |
| Overall | 100% | 60/100 | 68/100 |
Every spec in one table
Highlighted cells lead their row. Dashes mean the data is not published.
| Specification | GPT-5.4 ProOpenAI | Gemini 3.1 Pro PreviewGoogle |
|---|---|---|
| Capability | ||
| Capabilities Index (ECI) | 159.1 (best) | 154.8 |
| ECI rank | #11 of 148 (best) | #31 of 148 |
| GPQA DiamondGraduate-level science questions | 94.6% (best) | 94.4% |
| FrontierMath Tiers 1–3Research-level mathematics | 82.5% (best) | 59.7% |
| OTIS Mock AIME 2024–2025Competition mathematics | — | 95.6% |
| SWE-bench VerifiedFixing real GitHub issues | — | 75.6% |
| SimpleQA VerifiedShort factual questions | 46.3% | 73.5% (best) |
| Price per million tokens | ||
| Input | $30.00 | $2.00 (best) |
| Output | $180.00 | $12.00 (best) |
| Cached input | — | $0.20 |
| Blended (3:1) | $67.50 | $4.50 (best) |
| Long-context rate | Over 272K: $60.00 / $270.00 | Over 200K: $4.00 / $18.00 |
| Price source | Official OpenAI API | Official Google API |
| Limits | ||
| Context window | 1,050,000 tokens (best) | 1,048,576 tokens |
| Max output | 128,000 tokens (best) | 65,536 tokens |
| Inputs and features | ||
| Text | Yes | Yes |
| Images | Yes | Yes |
| PDFs | No | Yes |
| Audio | No | Yes |
| Video | No | Yes |
| Reasoning | Yesmedium · high · xhigh | Yeslow · medium · high |
| Tool calling | Yes | Yes |
| Structured output | No | Yes |
| Availability | ||
| Weights | Proprietary | Proprietary |
| API model ID | gpt-5.4-pro | gemini-3.1-pro-preview |
| API providers | 16 | 26 (best) |
| Released | Mar 5, 2026 | Feb 19, 2026 |
| Knowledge cutoff | Aug 31, 2025 | Jan 2025 |
What would a month cost?
Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.
- GPT-5.4 Pro$660.00
- Gemini 3.1 Pro Preview$44.00
Which should you choose?
Which is better: GPT-5.4 Pro or Gemini 3.1 Pro Preview?
Gemini 3.1 Pro Preview is the better all-round choice, scoring 68/100 against GPT-5.4 Pro (60). It leads on price and inputs & features. GPT-5.4 Pro wins on capability. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%.
Which is cheaper, GPT-5.4 Pro or Gemini 3.1 Pro Preview?
Gemini 3.1 Pro Preview is cheaper at $2.00 input / $12.00 output per million tokens (official Google API price). GPT-5.4 Pro costs $30.00 input / $180.00 output per million tokens (official OpenAI API price). At a typical mix of three input tokens to one output token, that is $4.50 per million tokens for Gemini 3.1 Pro Preview versus $67.50 for GPT-5.4 Pro (15× as much).
Which scores higher on benchmarks?
GPT-5.4 Pro scores higher on the Capabilities Index (ECI): GPT-5.4 Pro 159.1 (#11 of 148) and Gemini 3.1 Pro Preview 154.8 (#31 of 148). The confidence ranges of the top two overlap (156.5–161.9 vs 152.6–157.3), so treat the gap as small. On individual benchmarks: GPQA Diamond — GPT-5.4 Pro 94.6%, Gemini 3.1 Pro Preview 94.4%; FrontierMath Tiers 1–3 — GPT-5.4 Pro 82.5%, Gemini 3.1 Pro Preview 59.7%; SimpleQA Verified — Gemini 3.1 Pro Preview 73.5%, GPT-5.4 Pro 46.3%.
Which is better for coding?
There are no published SWE-bench Verified results for GPT-5.4 Pro yet, so there is no like-for-like coding score. On overall capability, GPT-5.4 Pro leads, which tends to carry over to coding, but test on your own codebase. Both support tool calling for agent workflows.
Which has the bigger context window?
Their context windows are effectively the same size: GPT-5.4 Pro 1,050,000 and Gemini 3.1 Pro Preview 1,048,576 tokens. Maximum output per response: GPT-5.4 Pro up to 128,000, Gemini 3.1 Pro Preview up to 65,536 tokens.
Which can read images, PDFs, audio or video?
GPT-5.4 Pro accepts text and images; Gemini 3.1 Pro Preview accepts text, images, PDFs, audio and video. Gemini 3.1 Pro Preview handles the widest range of inputs.
Are any of these open source?
No. GPT-5.4 Pro and Gemini 3.1 Pro Preview are proprietary and only available through APIs and apps.
Which is newer?
GPT-5.4 Pro is the newest, released Mar 5, 2026. Gemini 3.1 Pro Preview came out Feb 19, 2026. Knowledge cutoff: GPT-5.4 Pro Aug 31, 2025, Gemini 3.1 Pro Preview Jan 2025.
How do you decide the winner?
Each model gets a 0–100 score on capability (50%, independent benchmark results); price (25%, blended price per million tokens (3 input : 1 output), log scale); inputs & features (15%, image, PDF, audio and video input, tool calling, structured output and reasoning); context window (10%, maximum tokens per request, log scale). Dimensions missing for any model are dropped and the remaining weights rescaled, so every model is judged on the same evidence. Specs and prices come from public model listings and the labs’ own API pages; capability scores come from independent benchmark runs. Data updated Oct 4, 2026.
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