Gemini 3 Pro Preview vs GPT-6.1 Sol vs GPT-5.2
Too close to call on our weighted score (GPT-6.1 Sol 72, Gemini 3 Pro Preview 72, GPT-5.2 66). The right pick depends on what you value most.
GoogleGemini 3 Pro Preview
72/100- ECI153.0
- Price$2.00 / $12.00
- Context1.05M
OpenAIGPT-6.1 Sol
72/100- ECI—
- Price$2.00 / $10.00
- Context1.05M
- OpenAI
GPT-5.2
66/100- ECI153.5
- Price$1.75 / $14.00
- Context400K
Too close to call
It is close. Our weighted score puts them within a point (GPT-6.1 Sol 72/100, Gemini 3 Pro Preview 72/100, GPT-5.2 66/100), so choose by what matters most for your work: GPT-6.1 Sol for raw capability. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%. Capability uses the average of shared benchmarks (GPQA Diamond and OTIS Mock AIME 2024–2025), because GPT-6.1 Sol has no Capabilities Index score yet.
- CapabilityGPT-6.1 SolShared benchmarks: GPT-6.1 Sol 97.7% · GPT-5.2 93.8% · Gemini 3 Pro Preview 92.0%
- Lowest priceGPT-6.1 SolGPT-6.1 Sol $4.00 · Gemini 3 Pro Preview $4.50 · GPT-5.2 $4.81 per 1M tokens (3:1 blend)
- Longest contextGPT-6.1 Sol and Gemini 3 Pro PreviewGPT-6.1 Sol 1,050,000 · Gemini 3 Pro Preview 1,048,576 · GPT-5.2 400,000 tokens
- Widest inputsGemini 3 Pro PreviewGemini 3 Pro Preview: Text, Images, PDFs, Audio, Video · GPT-6.1 Sol: Text, Images, PDFs · GPT-5.2: Text, Images
- Self-hostingNo open weightsAll three are available only through APIs
| Measure | Weight | Gemini 3 Pro Preview | GPT-6.1 Sol | GPT-5.2 |
|---|---|---|---|---|
| CapabilityShared benchmarks | 50% | 92 | 98 | 94 |
| Price | 25% | 19 | 21 | 18 |
| Inputs & features | 15% | 100 | 80 | 70 |
| Context window | 10% | 61 | 61 | 44 |
| Overall | 100% | 72/100 | 72/100 | 66/100 |
Every spec in one table
Highlighted cells lead their row. Dashes mean the data is not published.
| Specification | Gemini 3 Pro PreviewGoogle | GPT-6.1 SolOpenAI | GPT-5.2OpenAI |
|---|---|---|---|
| Capability | |||
| Capabilities Index (ECI) | 153.0 | — | 153.5 (best) |
| ECI rank | #39 of 148 | — | #38 of 148 (best) |
| GPQA DiamondGraduate-level science questions | 92.6% | 95.4% (best) | 91.4% |
| FrontierMath Tiers 1–3Research-level mathematics | — | 93.7% (best) | 67.4% |
| OTIS Mock AIME 2024–2025Competition mathematics | 91.4% | 100% (best) | 96.1% |
| SWE-bench VerifiedFixing real GitHub issues | 72.9% | — | 73.8% (best) |
| SimpleQA VerifiedShort factual questions | — | 73.9% (best) | 37.1% |
| Price per million tokens | |||
| Input | $2.00 | $2.00 | $1.75 (best) |
| Output | $12.00 | $10.00 (best) | $14.00 |
| Cached input | — | $0.10 (best) | $0.175 |
| Blended (3:1) | $4.50 | $4.00 (best) | $4.81 |
| Long-context rate | Same rate | Over 272K: $4.00 / $15.00 | Same rate |
| Price source | Median of 2 providers | Official OpenAI API | Official OpenAI API |
| Limits | |||
| Context window | 1,048,576 tokens | 1,050,000 tokens (best) | 400,000 tokens |
| Max output | 65,536 tokens | 128,000 tokens (best) | 128,000 tokens (best) |
| Inputs and features | |||
| Text | Yes | Yes | Yes |
| Images | Yes | Yes | Yes |
| PDFs | Yes | Yes | No |
| Audio | Yes | No | No |
| Video | Yes | No | No |
| Reasoning | Yes | Yeslow · medium · high · xhigh · max | Yeslow · medium · high · xhigh |
| Tool calling | Yes | Yes | Yes |
| Structured output | Yes | Yes | Yes |
| Availability | |||
| Weights | Proprietary | Proprietary | Proprietary |
| API model ID | — | gpt-6.1-sol | gpt-5.2 |
| API providers | 3 | 21 (best) | 21 (best) |
| Released | Nov 18, 2025 | Sep 29, 2026 | Dec 11, 2025 |
| Knowledge cutoff | Jan 2025 | Apr 30, 2026 | Aug 31, 2025 |
What would a month cost?
Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.
- Gemini 3 Pro Preview$44.00
- GPT-6.1 Sol$40.00
- GPT-5.2$45.50
Which should you choose?
Which is better: Gemini 3 Pro Preview, GPT-6.1 Sol or GPT-5.2?
It is close. Our weighted score puts them within a point (GPT-6.1 Sol 72/100, Gemini 3 Pro Preview 72/100, GPT-5.2 66/100), so choose by what matters most for your work: GPT-6.1 Sol for raw capability. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%. Capability uses the average of shared benchmarks (GPQA Diamond and OTIS Mock AIME 2024–2025), because GPT-6.1 Sol has no Capabilities Index score yet.
Which is cheaper, Gemini 3 Pro Preview, GPT-6.1 Sol or GPT-5.2?
GPT-6.1 Sol is cheaper at $2.00 input / $10.00 output per million tokens (official OpenAI API price). Gemini 3 Pro Preview costs $2.00 input / $12.00 output per million tokens (median across 2 API providers); GPT-5.2 costs $1.75 input / $14.00 output per million tokens (official OpenAI API price). At a typical mix of three input tokens to one output token, that is $4.00 per million tokens for GPT-6.1 Sol versus $4.50 for Gemini 3 Pro Preview (1.1× as much) and $4.81 for GPT-5.2 (1.2× as much).
Which scores higher on benchmarks?
Not every model here has a Capabilities Index score, so we compare the average of shared benchmarks (GPQA Diamond and OTIS Mock AIME 2024–2025): GPT-6.1 Sol 97.7%, GPT-5.2 93.8% and Gemini 3 Pro Preview 92.0%. On individual benchmarks: GPQA Diamond — GPT-6.1 Sol 95.4%, Gemini 3 Pro Preview 92.6%, GPT-5.2 91.4%; OTIS Mock AIME 2024–2025 — GPT-6.1 Sol 100%, GPT-5.2 96.1%, Gemini 3 Pro Preview 91.4%.
Which is better for coding?
There are no published SWE-bench Verified results for GPT-6.1 Sol yet, so there is no like-for-like coding score. On overall capability, GPT-6.1 Sol leads, which tends to carry over to coding, but test on your own codebase. All three support tool calling for agent workflows.
Which has the bigger context window?
GPT-6.1 Sol and Gemini 3 Pro Preview have the largest context windows (1,050,000 and 1,048,576 tokens), against 400,000 for GPT-5.2. Maximum output per response: Gemini 3 Pro Preview up to 65,536, GPT-6.1 Sol up to 128,000, GPT-5.2 up to 128,000 tokens.
Which can read images, PDFs, audio or video?
Gemini 3 Pro Preview accepts text, images, PDFs, audio and video; GPT-6.1 Sol accepts text, images and PDFs; GPT-5.2 accepts text and images. Gemini 3 Pro Preview handles the widest range of inputs.
Are any of these open source?
No. Gemini 3 Pro Preview, GPT-6.1 Sol and GPT-5.2 are proprietary and only available through APIs and apps.
Which is newer?
GPT-6.1 Sol is the newest, released Sep 29, 2026. GPT-5.2 came out Dec 11, 2025; Gemini 3 Pro Preview came out Nov 18, 2025. Knowledge cutoff: Gemini 3 Pro Preview Jan 2025, GPT-6.1 Sol Apr 30, 2026, GPT-5.2 Aug 31, 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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