# GPT-5.1-Codex vs MiMo-V2.6-Flash

> Side-by-side benchmark comparison for GPT-5.1-Codex and MiMo-V2.6-Flash across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gpt-5-1-codex-vs-mimo-v2-6-flash
- Last updated: September 21, 2026

- Shared sourced benchmarks: 1
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

Evidence is too thin for a benchmark verdict: GPT-5.1-Codex and MiMo-V2.6-Flash share only 1 sourced benchmark row.

## Summary

- Only 1 shared sourced benchmark row is available. That is not enough for a broad capability verdict, so this mirror does not name an overall winner.
- MiMo-V2.6-Flash has the lower published output-token price.
- MiMo-V2.6-Flash has the larger published context window at 1M.

## Model Snapshot

| Property | GPT-5.1-Codex | MiMo-V2.6-Flash |
|----------|----------|----------|
| Creator | OpenAI | Xiaomi |
| Type | Proprietary | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 400K | 1M |
| Independent public score (not head-to-head) | 48.67 | null |
| Benchmarks Covered | 4 | 12 |
| Pricing (input/output) | $1.25 / $10.00 | $0.14 / $0.28 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- GPT-5.1-Codex public-lane score: 49.4 (Estimated · #65/154)
- MiMo-V2.6-Flash public-lane score: Coming soon

| Benchmark | GPT-5.1-Codex | MiMo-V2.6-Flash | Winner |
|-----------|-----------|-----------|--------|
| Gert Labs | 49.68% | Coming soon | Coming soon |
| JobBench | 26.2% | 61.2% | MiMo-V2.6-Flash |
| Toolathlon-Verified | Coming soon | 73.6% | Coming soon |
| AutomationBench | Coming soon | 52.3% | Coming soon |
| Agents' Last Exam | Coming soon | 27.6% | Coming soon |
| Terminal-Bench 4.0 | Coming soon | 28.80% | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 87.6% | Coming soon |
| OSWorld-Verified | Coming soon | 80.8% | Coming soon |
| CyberGym | Coming soon | 95.1% | Coming soon |
| ExploitGym | Coming soon | 6.0% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- GPT-5.1-Codex public-lane score: 45.7 (Estimated · #88/156)
- MiMo-V2.6-Flash public-lane score: Coming soon

| Benchmark | GPT-5.1-Codex | MiMo-V2.6-Flash | Winner |
|-----------|-----------|-----------|--------|
| Vibe Code Bench | 13.12% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 85.6% | Coming soon | Coming soon |
| DeepSWE | Coming soon | 67.9% | Coming soon |
| ProgramBench | Coming soon | 26.0% | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 87.6% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- GPT-5.1-Codex public-lane score: 68.6 (Unranked · 2 rankable rows)
- MiMo-V2.6-Flash public-lane score: Coming soon

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- GPT-5.1-Codex public-lane score: 66.9 (Unranked · 1 rankable row)
- MiMo-V2.6-Flash public-lane score: Coming soon

### Knowledge

- Winner: Insufficient shared evidence
- GPT-5.1-Codex public-lane score: 52.2 (Estimated · #69/186)
- MiMo-V2.6-Flash public-lane score: Coming soon

### Instruction Following

- Winner: Insufficient shared evidence
- GPT-5.1-Codex public-lane score: 84.2 (#42/124)
- MiMo-V2.6-Flash public-lane score: Coming soon

## FAQ

### Is there enough evidence to pick between GPT-5.1-Codex and MiMo-V2.6-Flash?

Not yet. The models share only 1 sourced benchmark row, so this mirror reports the available measurements and metadata without naming a broad winner.

### What can I compare safely on this page?

Published pricing, context windows, model type, and individual shared benchmark rows are directly comparable. Independent overall scores and non-overlapping benchmark coverage are labeled separately and should not be read as a controlled head-to-head result.

## Related Comparisons

- [GPT-5.1-Codex vs MiMo-V2.6-Pro](/compare/gpt-5-1-codex-vs-mimo-v2-6-pro)
- [MiMo-V2.6-Flash vs MiMo-V2.6-Pro](/compare/mimo-v2-6-flash-vs-mimo-v2-6-pro)
- [GPT-5.1-Codex vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-gpt-5-1-codex)
- [MiMo-V2.6-Flash vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-mimo-v2-6-flash)

## Explore More

- [GPT-5.1-Codex profile](/models/gpt-5-1-codex)
- [MiMo-V2.6-Flash profile](/models/mimo-v2-6-flash)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)