GPT-6 Astra vs MiMo-V2.6-Flash: Specs & Benchmark Comparison
GPT-6 Astra is developed by OpenAI, while MiMo-V2.6-Flash comes from Xiaomi. Both were released in September 2026. MiMo-V2.6-Flash has a published size of about 309 billion 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 25.3%; SEC-Bench Pro, where GPT-6 Astra scores 85.4% against 47.5%. Averaged across everything we track, GPT-6 Astra sits at 74.4% and MiMo-V2.6-Flash at 55.6%.
MiMo-V2.6-Flash is the cheaper API at $0.14 per million input tokens and $0.28 per million output tokens, roughly 71 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-Flash accepts text, images, audio, and video.
| Characteristic | GPT-6 Astra | MiMo-V2.6-Flash |
|---|---|---|
| Company | OpenAI | Xiaomi |
| Release Date | September 4, 2026 | September 22, 2026 |
| Parameters | — | 309B |
| Multimodal | Yes | Yes |
| Context (input) | 1.1M | 1.0M |
| Context (output) | 128K | — |
| Input Price / 1M | $10.00 | $0.14 |
| Output Price / 1M | $50.00 | $0.28 |
| Average Score | 74.4% | 55.6% |
| Benchmarks | ||
| ExploitBench | 100.0% | 25.3% |
| SEC-Bench Pro | 85.4% | 47.5% |
| ExploitGym | 42.4% | 6.0% |
| Agents' Last Exam | 59.3% | 27.6% |
| Terminal-Bench 4.0 | 57.7% | 28.8% |
| DeepSWE 1.1 | 74.1% | 67.9% |
Visual Benchmark Comparison
Verdict
MiMo-V2.6-Flash leads in 2 out of 4 comparison categories.
Both models show comparable average scores: GPT-6 Astra — 0.7, MiMo-V2.6-Flash — 0.6.
MiMo-V2.6-Flash is 142.9x cheaper: input $0.14/1M vs $10.00/1M tokens.
GPT-6 Astra supports a larger context: 1M vs 1M tokens.
MiMo-V2.6-Flash 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-Flash?
Which model is cheaper — GPT-6 Astra or MiMo-V2.6-Flash?
Which has a larger context window — GPT-6 Astra or MiMo-V2.6-Flash?
The GPT-6 Astra and MiMo-V2.6-Flash 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-Flash page. See also the complete list of AI model comparisons.