GPT-5.1 vs Inkling vs Qwen3.6 Max Preview
Too close to call on our weighted score (GPT-5.1 60, Inkling 59, Qwen3.6 Max Preview 54). The right pick depends on what you value most.
OpenAIGPT-5.1
60/100- ECI149.7
- Price$1.25 / $10.00
- Context400K
Thinking MachinesInkling
59/100- ECI148.6
- Price$3.74 / $9.36
- Context1.05M
Alibaba (Qwen)Qwen3.6 Max Preview
54/100- ECI149.2
- Price$1.30 / $7.80
- Context262K
Too close to call
It is close. Our weighted score puts them within 1 points (GPT-5.1 60/100, Inkling 59/100, Qwen3.6 Max Preview 54/100), so choose by what matters most for your work: GPT-5.1 for raw capability, Qwen3.6 Max Preview on price and Inkling for long inputs. 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 · Inkling 148.6
- Lowest priceQwen3.6 Max PreviewQwen3.6 Max Preview $2.92 · GPT-5.1 $3.44 · Inkling $5.14 per 1M tokens (3:1 blend)
- Longest contextInklingInkling 1,048,576 · GPT-5.1 400,000 · Qwen3.6 Max Preview 262,144 tokens
- Widest inputsInklingGPT-5.1: Text, Images · Inkling: Text, Images, Audio · Qwen3.6 Max Preview: Text
- Self-hostingInklingPublishes downloadable weights (Apache-2.0)
| Measure | Weight | GPT-5.1 | Inkling | Qwen3.6 Max Preview |
|---|---|---|---|---|
| CapabilityCapabilities Index (ECI) | 50% | 78 | 76 | 77 |
| Price | 25% | 24 | 16 | 28 |
| Inputs & features | 15% | 70 | 70 | 35 |
| Context window | 10% | 44 | 61 | 37 |
| Overall | 100% | 60/100 | 59/100 | 54/100 |
Every spec in one table
Highlighted cells lead their row. Dashes mean the data is not published.
| Specification | GPT-5.1OpenAI | InklingThinking Machines | Qwen3.6 Max PreviewAlibaba (Qwen) |
|---|---|---|---|
| Capability | |||
| Capabilities Index (ECI) | 149.7 (best) | 148.6 | 149.2 |
| ECI rank | #52 of 148 (best) | #57 of 148 | #54 of 148 |
| GPQA DiamondGraduate-level science questions | 87.6% | 88.3% (best) | 87.4% |
| FrontierMath Tiers 1–3Research-level mathematics | — | 33.3% | — |
| OTIS Mock AIME 2024–2025Competition mathematics | 88.6% | 88.9% | 91.1% (best) |
| SWE-bench VerifiedFixing real GitHub issues | 68.0% | — | 76.7% (best) |
| SimpleQA VerifiedShort factual questions | 48.0% | 40.3% | 52.0% (best) |
| Price per million tokens | |||
| Input | $1.25 (best) | $3.74 | $1.30 |
| Output | $10.00 | $9.36 | $7.80 (best) |
| Cached input | $0.125 (best) | $0.748 | $0.13 |
| Blended (3:1) | $3.44 | $5.14 | $2.92 (best) |
| Long-context rate | Same rate | Same rate | Same rate |
| Price source | Official OpenAI API | Official Thinking Machines API | Official Alibaba API |
| Limits | |||
| Context window | 400,000 tokens | 1,048,576 tokens (best) | 262,144 tokens |
| Max output | 128,000 tokens | 1,048,576 tokens (best) | 65,536 tokens |
| Inputs and features | |||
| Text | Yes | Yes | Yes |
| Images | Yes | Yes | No |
| PDFs | No | No | No |
| Audio | No | Yes | No |
| Video | No | No | No |
| Reasoning | Yeslow · medium · high | Yeslow · medium · high · xhigh · max | Yes |
| Tool calling | Yes | Yes | Yes |
| Structured output | Yes | No | No |
| Availability | |||
| Weights | Proprietary | OpenApache-2.0 | Proprietary |
| API model ID | gpt-5.1 | thinkingmachines/Inkling:peft:262144 | qwen3.6-max-preview |
| API providers | 21 | 23 (best) | 10 |
| Released | Nov 13, 2025 | Jul 15, 2026 | Apr 20, 2026 |
| Knowledge cutoff | Sep 30, 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
- Inkling$56.12
- Qwen3.6 Max Preview$28.60
Which should you choose?
Which is better: GPT-5.1, Inkling or Qwen3.6 Max Preview?
It is close. Our weighted score puts them within 1 points (GPT-5.1 60/100, Inkling 59/100, Qwen3.6 Max Preview 54/100), so choose by what matters most for your work: GPT-5.1 for raw capability, Qwen3.6 Max Preview on price and Inkling for long inputs. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%.
Which is cheaper, GPT-5.1, Inkling 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); Inkling costs $3.74 input / $9.36 output per million tokens (official Thinking Machines 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 $5.14 for Inkling (1.8× 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 Inkling 148.6 (#57 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. On individual benchmarks: GPQA Diamond — Inkling 88.3%, GPT-5.1 87.6%, Qwen3.6 Max Preview 87.4%; OTIS Mock AIME 2024–2025 — Qwen3.6 Max Preview 91.1%, Inkling 88.9%, GPT-5.1 88.6%; SimpleQA Verified — Qwen3.6 Max Preview 52.0%, GPT-5.1 48.0%, Inkling 40.3%.
Which is better for coding?
There are no published SWE-bench Verified results for Inkling 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?
Inkling has the largest context window at 1,048,576 tokens, against 400,000 for GPT-5.1 and 262,144 for Qwen3.6 Max Preview. Maximum output per response: GPT-5.1 up to 128,000, Inkling up to 1,048,576, Qwen3.6 Max Preview up to 65,536 tokens.
Which can read images, PDFs, audio or video?
GPT-5.1 accepts text and images; Inkling accepts text, images and audio; Qwen3.6 Max Preview accepts text. Inkling handles the widest range of inputs.
Are any of these open source?
Inkling publishes its weights (Apache-2.0) and can be self-hosted; GPT-5.1 and Qwen3.6 Max Preview is proprietary.
Which is newer?
Inkling is the newest, released Jul 15, 2026. Qwen3.6 Max Preview came out Apr 20, 2026; GPT-5.1 came out Nov 13, 2025. Knowledge cutoff: GPT-5.1 Sep 30, 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.
