GPT-6 Astra vs MiMo-V2.6-Pro: Specs & Benchmark Comparison
GPT-6 Astra is developed by OpenAI, while MiMo-V2.6-Pro comes from Xiaomi. Both were released in September 2026. MiMo-V2.6-Pro has a published size of about 1.0 trillion parameters; OpenAI has not disclosed the parameter count of GPT-6 Astra.
The two models share 6 published benchmarks. GPT-6 Astra leads on 6 of them. The widest gaps are on ExploitBench, where GPT-6 Astra scores 100.0% against 47.9%; Agents' Last Exam, where GPT-6 Astra scores 59.3% against 31.6%. Averaged across everything we track, GPT-6 Astra sits at 74.4% and MiMo-V2.6-Pro at 59.7%.
MiMo-V2.6-Pro is the cheaper API at $0.43 per million input tokens and $0.87 per million output tokens, roughly 23 times cheaper than GPT-6 Astra at $10 and $50. Both accept a context window of about 1M tokens. GPT-6 Astra accepts text and images as input, while MiMo-V2.6-Pro accepts text, images, audio, and video.
| Characteristic | GPT-6 Astra | MiMo-V2.6-Pro |
|---|---|---|
| Company | OpenAI | Xiaomi |
| Release Date | September 4, 2026 | September 22, 2026 |
| Parameters | — | 1.0T |
| Multimodal | Yes | Yes |
| Context (input) | 1.1M | 1.0M |
| Context (output) | 128K | — |
| Input Price / 1M | $10.00 | $0.43 |
| Output Price / 1M | $50.00 | $0.87 |
| Average Score | 74.4% | 59.7% |
| Benchmarks | ||
| ExploitBench | 100.0% | 47.9% |
| Agents' Last Exam | 59.3% | 31.6% |
| ExploitGym | 42.4% | 17.8% |
| Terminal-Bench 4.0 | 57.7% | 34.9% |
| SEC-Bench Pro | 85.4% | 66.3% |
| DeepSWE 1.1 | 74.1% | 71.9% |
Visual Benchmark Comparison
Verdict
MiMo-V2.6-Pro leads in 2 out of 4 comparison categories.
Both models show comparable average scores: GPT-6 Astra — 0.7, MiMo-V2.6-Pro — 0.6.
MiMo-V2.6-Pro is 46.0x cheaper: input $0.43/1M vs $10.00/1M tokens.
GPT-6 Astra supports a larger context: 1M vs 1M tokens.
MiMo-V2.6-Pro is newer: released 9/22/2026 vs 9/4/2026.
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Frequently Asked Questions
Which is better for coding — GPT-6 Astra or MiMo-V2.6-Pro?
Which model is cheaper — GPT-6 Astra or MiMo-V2.6-Pro?
Which has a larger context window — GPT-6 Astra or MiMo-V2.6-Pro?
The GPT-6 Astra and MiMo-V2.6-Pro comparison is updated for 2026. Data includes benchmark results, API pricing, context window size and other specifications. For more detailed information, visit the GPT-6 Astra or MiMo-V2.6-Pro page. See also the complete list of AI model comparisons.