Qwen3.6 Max Preview vs o3-pro vs GLM-5.1
GLM-5.1 comes out ahead, 57 to 54 and 51 on our weighted score, and it is the cheaper option too.
Alibaba (Qwen)Qwen3.6 Max Preview
54/100- ECI149.2
- Price$1.30 / $7.80
- Context262K
OpenAIo3-pro
51/100- ECI147.4
- Price$20.00 / $80.00
- Context200K
- Our pick
Z.ai (Zhipu)GLM-5.1
57/100- ECI149.9
- Price$1.40 / $4.40
- Context200K
GLM-5.1 is our pick
GLM-5.1 is the better all-round choice, scoring 57/100 against Qwen3.6 Max Preview (54) and o3-pro (51). It leads on price. Qwen3.6 Max Preview wins on context window. o3-pro wins on inputs & features. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%.
- CapabilityGLM-5.1Capabilities Index (ECI): GLM-5.1 149.9 · Qwen3.6 Max Preview 149.2 · o3-pro 147.4
- Lowest priceGLM-5.1GLM-5.1 $2.15 · Qwen3.6 Max Preview $2.92 · o3-pro $35.00 per 1M tokens (3:1 blend)
- Longest contextQwen3.6 Max PreviewQwen3.6 Max Preview 262,144 · o3-pro 200,000 · GLM-5.1 200,000 tokens
- Widest inputso3-proQwen3.6 Max Preview: Text · o3-pro: Text, Images · GLM-5.1: Text
- Self-hostingGLM-5.1Publishes downloadable weights
| Measure | Weight | Qwen3.6 Max Preview | o3-pro | GLM-5.1 |
|---|---|---|---|---|
| CapabilityCapabilities Index (ECI) | 50% | 77 | 75 | 78 |
| Price | 25% | 28 | 0 | 34 |
| Inputs & features | 15% | 35 | 70 | 45 |
| Context window | 10% | 37 | 32 | 32 |
| Overall | 100% | 54/100 | 51/100 | 57/100 |
Every spec in one table
Highlighted cells lead their row. Dashes mean the data is not published.
| Specification | Qwen3.6 Max PreviewAlibaba (Qwen) | o3-proOpenAI | GLM-5.1Z.ai (Zhipu) |
|---|---|---|---|
| Capability | |||
| Capabilities Index (ECI) | 149.2 | 147.4 | 149.9 (best) |
| ECI rank | #54 of 148 | #60 of 148 | #51 of 148 (best) |
| GPQA DiamondGraduate-level science questions | 87.4% | — | 89.9% (best) |
| FrontierMath Tiers 1–3Research-level mathematics | — | — | 36.8% |
| OTIS Mock AIME 2024–2025Competition mathematics | 91.1% | — | 93.3% (best) |
| SWE-bench VerifiedFixing real GitHub issues | 76.7% (best) | — | 74.2% |
| SimpleQA VerifiedShort factual questions | 52.0% (best) | — | 34.0% |
| Price per million tokens | |||
| Input | $1.30 (best) | $20.00 | $1.40 |
| Output | $7.80 | $80.00 | $4.40 (best) |
| Cached input | $0.13 (best) | — | $0.26 |
| Blended (3:1) | $2.92 | $35.00 | $2.15 (best) |
| Long-context rate | Same rate | Same rate | Same rate |
| Price source | Official Alibaba API | Official OpenAI API | Official Z.AI API |
| Limits | |||
| Context window | 262,144 tokens (best) | 200,000 tokens | 200,000 tokens |
| Max output | 65,536 tokens | 100,000 tokens | 131,072 tokens (best) |
| Inputs and features | |||
| Text | Yes | Yes | Yes |
| Images | No | Yes | No |
| PDFs | No | No | No |
| Audio | No | No | No |
| Video | No | No | No |
| Reasoning | Yes | Yeslow · medium · high | Yes |
| Tool calling | Yes | Yes | Yes |
| Structured output | No | Yes | Yes |
| Availability | |||
| Weights | Proprietary | Proprietary | Open |
| API model ID | qwen3.6-max-preview | o3-pro | glm-5.1 |
| API providers | 10 | 6 | 40 (best) |
| Released | Apr 20, 2026 | Jun 10, 2025 | Apr 7, 2026 |
| Knowledge cutoff | Apr 2025 | May 2024 | — |
What would a month cost?
Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.
- Qwen3.6 Max Preview$28.60
- o3-pro$360.00
- GLM-5.1$22.80
Which should you choose?
Which is better: Qwen3.6 Max Preview, o3-pro or GLM-5.1?
GLM-5.1 is the better all-round choice, scoring 57/100 against Qwen3.6 Max Preview (54) and o3-pro (51). It leads on price. Qwen3.6 Max Preview wins on context window. o3-pro wins on inputs & features. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%.
Which is cheaper, Qwen3.6 Max Preview, o3-pro or GLM-5.1?
GLM-5.1 is cheaper at $1.40 input / $4.40 output per million tokens (official Z.AI API price). Qwen3.6 Max Preview costs $1.30 input / $7.80 output per million tokens (official Alibaba 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 $2.15 per million tokens for GLM-5.1 versus $2.92 for Qwen3.6 Max Preview (1.4× as much) and $35.00 for o3-pro (16× as much).
Which scores higher on benchmarks?
GLM-5.1 scores higher on the Capabilities Index (ECI): GLM-5.1 149.9 (#51 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 (148.0–151.6 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, GLM-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?
Qwen3.6 Max Preview has the largest context window at 262,144 tokens, against 200,000 for o3-pro and 200,000 for GLM-5.1. Maximum output per response: Qwen3.6 Max Preview up to 65,536, o3-pro up to 100,000, GLM-5.1 up to 131,072 tokens.
Which can read images, PDFs, audio or video?
Qwen3.6 Max Preview accepts text; o3-pro accepts text and images; GLM-5.1 accepts text. o3-pro handles the widest range of inputs.
Are any of these open source?
GLM-5.1 publishes its weights and can be self-hosted; Qwen3.6 Max Preview and o3-pro is proprietary.
Which is newer?
Qwen3.6 Max Preview is the newest, released Apr 20, 2026. GLM-5.1 came out Apr 7, 2026; o3-pro came out Jun 10, 2025. Knowledge cutoff: Qwen3.6 Max Preview Apr 2025, o3-pro May 2024.
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.
