GPT-6 Astra vs MiMo-V2.6-Pro-UltraSpeed vs Qwen 3.8 Max Prime
Too close to call on our weighted score (MiMo-V2.6-Pro-UltraSpeed 44, Qwen 3.8 Max Prime 42, GPT-6 Astra 36). The right pick depends on what you value most.
OpenAIGPT-6 Astra
36/100- ECI166.5
- Price$10.00 / $50.00
- Context1.05M
XiaomiMiMo-V2.6-Pro-UltraSpeed
44/100- ECI—
- Price$4.35 / $8.70
- Context1.05M
Alibaba (Qwen)Qwen 3.8 Max Prime
42/100- ECI—
- Price$4.00 / $12.00
- Context1M
Too close to call
It is close. Our weighted score puts them within 1 points (MiMo-V2.6-Pro-UltraSpeed 44/100, Qwen 3.8 Max Prime 42/100, GPT-6 Astra 36/100), so choose by what matters most for your work: MiMo-V2.6-Pro-UltraSpeed on price. The score weighs price 50%, inputs & features 30%, context window 20%. None of the shared benchmarks cover every model here yet, so capability is left out of this verdict.
- CapabilityNot enough dataNo independent benchmark covers every model here yet
- Lowest priceMiMo-V2.6-Pro-UltraSpeedMiMo-V2.6-Pro-UltraSpeed $5.44 · Qwen 3.8 Max Prime $6.00 · GPT-6 Astra $20.00 per 1M tokens (3:1 blend)
- Longest contextGPT-6 Astra and MiMo-V2.6-Pro-UltraSpeedGPT-6 Astra 1,050,000 · MiMo-V2.6-Pro-UltraSpeed 1,048,576 · Qwen 3.8 Max Prime 1,000,000 tokens
- Widest inputsMiMo-V2.6-Pro-UltraSpeedGPT-6 Astra: Text, Images, PDFs · MiMo-V2.6-Pro-UltraSpeed: Text, Images, Audio, Video · Qwen 3.8 Max Prime: Text, Images, Video
- Self-hostingMiMo-V2.6-Pro-UltraSpeedPublishes downloadable weights
| Measure | Weight | GPT-6 Astra | MiMo-V2.6-Pro-UltraSpeed | Qwen 3.8 Max Prime |
|---|---|---|---|---|
| Price | 50% | 0 | 15 | 13 |
| Inputs & features | 30% | 80 | 80 | 80 |
| Context window | 20% | 61 | 61 | 60 |
| Overall | 100% | 36/100 | 44/100 | 42/100 |
Left out because at least one model lacks the data: capability. The remaining weights were rescaled.
Every spec in one table
Highlighted cells lead their row. Dashes mean the data is not published.
| Specification | GPT-6 AstraOpenAI | MiMo-V2.6-Pro-UltraSpeedXiaomi | Qwen 3.8 Max PrimeAlibaba (Qwen) |
|---|---|---|---|
| Capability | |||
| Capabilities Index (ECI) | 166.5 | — | — |
| ECI rank | #2 of 148 | — | — |
| GPQA DiamondGraduate-level science questions | 95.8% | — | — |
| FrontierMath Tiers 1–3Research-level mathematics | 93.7% | — | — |
| OTIS Mock AIME 2024–2025Competition mathematics | 100% | — | — |
| SimpleQA VerifiedShort factual questions | 75.6% | — | — |
| Price per million tokens | |||
| Input | $10.00 | $4.35 | $4.00 (best) |
| Output | $50.00 | $8.70 (best) | $12.00 |
| Cached input | $1.00 | $0.036 (best) | — |
| Blended (3:1) | $20.00 | $5.44 (best) | $6.00 |
| Long-context rate | Over 272K: $20.00 / $75.00 | Same rate | Same rate |
| Price source | Official OpenAI API | Official Xiaomi API | Median of 4 providers |
| Limits | |||
| Context window | 1,050,000 tokens (best) | 1,048,576 tokens | 1,000,000 tokens |
| Max output | 128,000 tokens | 131,072 tokens (best) | 131,072 tokens (best) |
| Inputs and features | |||
| Text | Yes | Yes | Yes |
| Images | Yes | Yes | Yes |
| PDFs | Yes | No | No |
| Audio | No | Yes | No |
| Video | No | Yes | Yes |
| Reasoning | Yeslow · medium · high · xhigh · max | Yes | Yes |
| Tool calling | Yes | Yes | Yes |
| Structured output | Yes | No | Yes |
| Availability | |||
| Weights | Proprietary | Open | Proprietary |
| API model ID | gpt-6-astra | mimo-v2.6-pro-ultraspeed | — |
| API providers | 26 (best) | 9 | 4 |
| Released | Sep 4, 2026 | Sep 21, 2026 | Sep 23, 2026 |
| Knowledge cutoff | Apr 30, 2026 | — | — |
What would a month cost?
Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.
- GPT-6 Astra$200.00
- MiMo-V2.6-Pro-UltraSpeed$60.90
- Qwen 3.8 Max Prime$64.00
Which should you choose?
Which is better: GPT-6 Astra, MiMo-V2.6-Pro-UltraSpeed or Qwen 3.8 Max Prime?
It is close. Our weighted score puts them within 1 points (MiMo-V2.6-Pro-UltraSpeed 44/100, Qwen 3.8 Max Prime 42/100, GPT-6 Astra 36/100), so choose by what matters most for your work: MiMo-V2.6-Pro-UltraSpeed on price. The score weighs price 50%, inputs & features 30%, context window 20%. None of the shared benchmarks cover every model here yet, so capability is left out of this verdict.
Which is cheaper, GPT-6 Astra, MiMo-V2.6-Pro-UltraSpeed or Qwen 3.8 Max Prime?
MiMo-V2.6-Pro-UltraSpeed is cheaper at $4.35 input / $8.70 output per million tokens (official Xiaomi API price). Qwen 3.8 Max Prime costs $4.00 input / $12.00 output per million tokens (median across 4 API providers); GPT-6 Astra costs $10.00 input / $50.00 output per million tokens (official OpenAI API price). At a typical mix of three input tokens to one output token, that is $5.44 per million tokens for MiMo-V2.6-Pro-UltraSpeed versus $6.00 for Qwen 3.8 Max Prime (1.1× as much) and $20.00 for GPT-6 Astra (3.7× as much).
Which scores higher on benchmarks?
There is no independent benchmark that covers all three models yet. GPT-6 Astra has an ECI of 166.5, MiMo-V2.6-Pro-UltraSpeed has not been scored yet and Qwen 3.8 Max Prime has not been scored yet.
Which is better for coding?
There are no published SWE-bench Verified results for GPT-6 Astra, MiMo-V2.6-Pro-UltraSpeed and Qwen 3.8 Max Prime yet, so there is no like-for-like coding score. Test both on a sample of your own tasks. All three support tool calling for agent workflows.
Which has the bigger context window?
GPT-6 Astra and MiMo-V2.6-Pro-UltraSpeed have the largest context windows (1,050,000 and 1,048,576 tokens), against 1,000,000 for Qwen 3.8 Max Prime. Maximum output per response: GPT-6 Astra up to 128,000, MiMo-V2.6-Pro-UltraSpeed up to 131,072, Qwen 3.8 Max Prime up to 131,072 tokens.
Which can read images, PDFs, audio or video?
GPT-6 Astra accepts text, images and PDFs; MiMo-V2.6-Pro-UltraSpeed accepts text, images, audio and video; Qwen 3.8 Max Prime accepts text, images and video. MiMo-V2.6-Pro-UltraSpeed handles the widest range of inputs.
Are any of these open source?
MiMo-V2.6-Pro-UltraSpeed publishes its weights and can be self-hosted; GPT-6 Astra and Qwen 3.8 Max Prime is proprietary.
Which is newer?
Qwen 3.8 Max Prime is the newest, released Sep 23, 2026. MiMo-V2.6-Pro-UltraSpeed came out Sep 21, 2026; GPT-6 Astra came out Sep 4, 2026. Knowledge cutoff: GPT-6 Astra Apr 30, 2026.
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.
