# GPT-5.1-Codex vs MiMo-V2.5

> Side-by-side benchmark comparison for GPT-5.1-Codex and MiMo-V2.5 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gpt-5-1-codex-vs-mimo-v2-5
- Last updated: September 29, 2026

- Shared sourced benchmarks: 2
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.7

## Quick Verdict

Evidence is too thin for a benchmark verdict: GPT-5.1-Codex and MiMo-V2.5 share only 2 sourced benchmark rows.

## Summary

- Only 2 shared sourced benchmark rows are available. That is not enough for a broad capability verdict, so this mirror does not name an overall winner.
- MiMo-V2.5 has the lower published output-token price.
- MiMo-V2.5 has the larger published context window at 1M.

## Model Snapshot

| Property | GPT-5.1-Codex | MiMo-V2.5 |
|----------|----------|----------|
| Creator | OpenAI | Xiaomi |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 400K | 1M |
| Independent public score (not head-to-head) | 44.38 | null |
| Benchmarks Covered | 4 | 15 |
| Pricing (input/output) | $1.25 / $10.00 | Pricing unavailable / Pricing unavailable |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- GPT-5.1-Codex public-lane score: Coming soon
- MiMo-V2.5 public-lane score: 31.2 (Estimated · #77/117)

| Benchmark | GPT-5.1-Codex | MiMo-V2.5 | Winner |
|-----------|-----------|-----------|--------|
| Gert Labs | 49.68% | 46.89% | GPT-5.1-Codex |
| JobBench | 26.2% | Coming soon | Coming soon |
| Claw-Eval | Coming soon | 62.3% | Coming soon |
| MM-ClawBench | Coming soon | 23.8% | Coming soon |
| Terminal-Bench 2.0 | Coming soon | 65.8% | Coming soon |
| ResearchClawBench | Coming soon | 16.9% | Coming soon |
| Terminal-Bench 2.1 (Vals) | Coming soon | 60.7% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- GPT-5.1-Codex public-lane score: 32.7 (Estimated · #85/143)
- MiMo-V2.5 public-lane score: 37.8 (Supported · #70/143)

| Benchmark | GPT-5.1-Codex | MiMo-V2.5 | Winner |
|-----------|-----------|-----------|--------|
| Vibe Code Bench | 13.12% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 85.6% | 81.5% | GPT-5.1-Codex |
| SWE-bench Pro | Coming soon | 56.1% | Coming soon |
| Terminal-Bench 2.0 | Coming soon | 65.8% | Coming soon |
| SWE-bench (Vals) | Coming soon | 71.0% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- GPT-5.1-Codex public-lane score: 69.9 (Unranked · 2 rankable rows)
- MiMo-V2.5 public-lane score: Coming soon

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- GPT-5.1-Codex public-lane score: 67.9 (Unranked · 1 rankable row)
- MiMo-V2.5 public-lane score: 60.1 (#31/50)

| Benchmark | GPT-5.1-Codex | MiMo-V2.5 | Winner |
|-----------|-----------|-----------|--------|
| Video-MME (with subtitle) | Coming soon | 87.7% | Coming soon |
| CharXiv | Coming soon | 81% | Coming soon |
| MMMU-Pro | Coming soon | 77.9% | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- GPT-5.1-Codex public-lane score: 48.1 (Estimated · #69/169)
- MiMo-V2.5 public-lane score: Coming soon

| Benchmark | GPT-5.1-Codex | MiMo-V2.5 | Winner |
|-----------|-----------|-----------|--------|
| GPQA Diamond (Vals) | Coming soon | 81.6% | Coming soon |
| MMLU-Pro (Vals) | Coming soon | 82.9% | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- GPT-5.1-Codex public-lane score: 84.2 (#42/124)
- MiMo-V2.5 public-lane score: Coming soon

## FAQ

### Is there enough evidence to pick between GPT-5.1-Codex and MiMo-V2.5?

Not yet. The models share only 2 sourced benchmark rows, 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-V2.5-Pro](/compare/gpt-5-1-codex-vs-mimo-v2-5-pro)
- [MiMo-V2.5 vs MiMo-V2.5-Pro](/compare/mimo-v2-5-vs-mimo-v2-5-pro)
- [GPT-5.1-Codex vs GPT-6 Astra](/compare/gpt-5-1-codex-vs-gpt-6-astra)
- [MiMo-V2.5 vs GPT-6 Astra](/compare/gpt-6-astra-vs-mimo-v2-5)

## Explore More

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