GPT-5.6 Terra vs MiMo-V2.6-Pro: Specs & Benchmark Comparison
GPT-5.6 Terra is developed by OpenAI, while MiMo-V2.6-Pro comes from Xiaomi. GPT-5.6 Terra was released in July 2026, and MiMo-V2.6-Pro followed 2 months later 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-5.6 Terra.
The two models share 7 published benchmarks. MiMo-V2.6-Pro leads on 4 of them, GPT-5.6 Terra on 3. The widest gaps are on Agents' Last Exam, where GPT-5.6 Terra scores 50.4% against 31.6%; Terminal-Bench 4.0, where MiMo-V2.6-Pro scores 34.9% against 21.5%. Averaged across everything we track, GPT-5.6 Terra sits at 59.0% 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 5 times cheaper than GPT-5.6 Terra at $2 and $12. Both accept a context window of about 1M tokens. GPT-5.6 Terra accepts text and images as input, while MiMo-V2.6-Pro accepts text, images, audio, and video.
| Characteristic | GPT-5.6 Terra | MiMo-V2.6-Pro |
|---|---|---|
| Company | OpenAI | Xiaomi |
| Release Date | July 9, 2026 | September 22, 2026 |
| Parameters | — | 1.0T |
| Multimodal | Yes | Yes |
| Context (input) | 1.1M | 1.0M |
| Context (output) | 128K | — |
| Input Price / 1M | $2.00 | $0.43 |
| Output Price / 1M | $12.00 | $0.87 |
| Average Score | 59.0% | 59.7% |
| Benchmarks | ||
| Agents' Last Exam | 50.4% | 31.6% |
| Terminal-Bench 4.0 | 21.5% | 34.9% |
| SEC-bench Pro | 57.7% | 66.3% |
| ExploitGym | 23.2% | 17.8% |
| ExploitBench | 52.9% | 47.9% |
| Terminal-Bench 2.1 | 87.4% | 89.9% |
| DeepSWE 1.1 | 70.0% | 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-5.6 Terra — 0.6, MiMo-V2.6-Pro — 0.6.
MiMo-V2.6-Pro is 10.7x cheaper: input $0.43/1M vs $2.00/1M tokens.
GPT-5.6 Terra supports a larger context: 1M vs 1M tokens.
MiMo-V2.6-Pro is newer: released 9/22/2026 vs 7/9/2026.
More About These Models
Related Comparisons
Frequently Asked Questions
Which is better for coding — GPT-5.6 Terra or MiMo-V2.6-Pro?
Which model is cheaper — GPT-5.6 Terra or MiMo-V2.6-Pro?
Which has a larger context window — GPT-5.6 Terra or MiMo-V2.6-Pro?
The GPT-5.6 Terra 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-5.6 Terra or MiMo-V2.6-Pro page. See also the complete list of AI model comparisons.