GPT-5.1 vs o3-pro vs Qwen3.6 Max Preview
GPT-5.1 comes out ahead, 60 to 54 and 51 on our weighted score, though Qwen3.6 Max Preview is 15% cheaper per token.
- Our pick
OpenAIGPT-5.1
60/100- ECI149.7
- Price$1.25 / $10.00
- Context400K
- OpenAI
o3-pro
51/100- ECI147.4
- Price$20.00 / $80.00
- Context200K
Alibaba (Qwen)Qwen3.6 Max Preview
54/100- ECI149.2
- Price$1.30 / $7.80
- Context262K
GPT-5.1 is our pick
GPT-5.1 is the better all-round choice, scoring 60/100 against Qwen3.6 Max Preview (54) and o3-pro (51). It leads on context window. Qwen3.6 Max Preview wins on price. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%.
- CapabilityGPT-5.1Capabilities Index (ECI): GPT-5.1 149.7 · Qwen3.6 Max Preview 149.2 · o3-pro 147.4
- Lowest priceQwen3.6 Max PreviewQwen3.6 Max Preview $2.92 · GPT-5.1 $3.44 · o3-pro $35.00 per 1M tokens (3:1 blend)
- Longest contextGPT-5.1GPT-5.1 400,000 · Qwen3.6 Max Preview 262,144 · o3-pro 200,000 tokens
- Widest inputsGPT-5.1 and o3-proGPT-5.1: Text, Images · o3-pro: Text, Images · Qwen3.6 Max Preview: Text
- Self-hostingNo open weightsAll three are available only through APIs
| Measure | Weight | GPT-5.1 | o3-pro | Qwen3.6 Max Preview |
|---|---|---|---|---|
| CapabilityCapabilities Index (ECI) | 50% | 78 | 75 | 77 |
| Price | 25% | 24 | 0 | 28 |
| Inputs & features | 15% | 70 | 70 | 35 |
| Context window | 10% | 44 | 32 | 37 |
| Overall | 100% | 60/100 | 51/100 | 54/100 |
Every spec in one table
Highlighted cells lead their row. Dashes mean the data is not published.
| Specification | GPT-5.1OpenAI | o3-proOpenAI | Qwen3.6 Max PreviewAlibaba (Qwen) |
|---|---|---|---|
| Capability | |||
| Capabilities Index (ECI) | 149.7 (best) | 147.4 | 149.2 |
| ECI rank | #52 of 148 (best) | #60 of 148 | #54 of 148 |
| GPQA DiamondGraduate-level science questions | 87.6% (best) | — | 87.4% |
| OTIS Mock AIME 2024–2025Competition mathematics | 88.6% | — | 91.1% (best) |
| SWE-bench VerifiedFixing real GitHub issues | 68.0% | — | 76.7% (best) |
| SimpleQA VerifiedShort factual questions | 48.0% | — | 52.0% (best) |
| Price per million tokens | |||
| Input | $1.25 (best) | $20.00 | $1.30 |
| Output | $10.00 | $80.00 | $7.80 (best) |
| Cached input | $0.125 (best) | — | $0.13 |
| Blended (3:1) | $3.44 | $35.00 | $2.92 (best) |
| Long-context rate | Same rate | Same rate | Same rate |
| Price source | Official OpenAI API | Official OpenAI API | Official Alibaba API |
| Limits | |||
| Context window | 400,000 tokens (best) | 200,000 tokens | 262,144 tokens |
| Max output | 128,000 tokens (best) | 100,000 tokens | 65,536 tokens |
| Inputs and features | |||
| Text | Yes | Yes | Yes |
| Images | Yes | Yes | No |
| PDFs | No | No | No |
| Audio | No | No | No |
| Video | No | No | No |
| Reasoning | Yeslow · medium · high | Yeslow · medium · high | Yes |
| Tool calling | Yes | Yes | Yes |
| Structured output | Yes | Yes | No |
| Availability | |||
| Weights | Proprietary | Proprietary | Proprietary |
| API model ID | gpt-5.1 | o3-pro | qwen3.6-max-preview |
| API providers | 21 (best) | 6 | 10 |
| Released | Nov 13, 2025 | Jun 10, 2025 | Apr 20, 2026 |
| Knowledge cutoff | Sep 30, 2024 | May 2024 | Apr 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-5.1$32.50
- o3-pro$360.00
- Qwen3.6 Max Preview$28.60
Which should you choose?
Which is better: GPT-5.1, o3-pro or Qwen3.6 Max Preview?
GPT-5.1 is the better all-round choice, scoring 60/100 against Qwen3.6 Max Preview (54) and o3-pro (51). It leads on context window. Qwen3.6 Max Preview wins on price. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%.
Which is cheaper, GPT-5.1, o3-pro or Qwen3.6 Max Preview?
Qwen3.6 Max Preview is cheaper at $1.30 input / $7.80 output per million tokens (official Alibaba API price). GPT-5.1 costs $1.25 input / $10.00 output per million tokens (official OpenAI API price); o3-pro costs $20.00 input / $80.00 output per million tokens (official OpenAI API price). At a typical mix of three input tokens to one output token, that is $2.92 per million tokens for Qwen3.6 Max Preview versus $3.44 for GPT-5.1 (1.2× as much) and $35.00 for o3-pro (12× as much).
Which scores higher on benchmarks?
GPT-5.1 scores higher on the Capabilities Index (ECI): GPT-5.1 149.7 (#52 of 148), Qwen3.6 Max Preview 149.2 (#54 of 148) and o3-pro 147.4 (#60 of 148). The confidence ranges of the top two overlap (148.3–151.1 vs 147.6–152.0), so treat the gap as small.
Which is better for coding?
There are no published SWE-bench Verified results for o3-pro yet, so there is no like-for-like coding score. On overall capability, GPT-5.1 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-5.1 has the largest context window at 400,000 tokens, against 262,144 for Qwen3.6 Max Preview and 200,000 for o3-pro. Maximum output per response: GPT-5.1 up to 128,000, o3-pro up to 100,000, Qwen3.6 Max Preview up to 65,536 tokens.
Which can read images, PDFs, audio or video?
GPT-5.1 accepts text and images; o3-pro accepts text and images; Qwen3.6 Max Preview accepts text. GPT-5.1 handles the widest range of inputs.
Are any of these open source?
No. GPT-5.1, o3-pro and Qwen3.6 Max Preview are proprietary and only available through APIs and apps.
Which is newer?
Qwen3.6 Max Preview is the newest, released Apr 20, 2026. GPT-5.1 came out Nov 13, 2025; o3-pro came out Jun 10, 2025. Knowledge cutoff: GPT-5.1 Sep 30, 2024, o3-pro May 2024, Qwen3.6 Max Preview Apr 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.
