# GPT-5.3 Codex vs MiMo-V2.6-Pro

> Side-by-side benchmark comparison for GPT-5.3 Codex and MiMo-V2.6-Pro across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gpt-5-3-codex-vs-mimo-v2-6-pro
- Last updated: September 21, 2026

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

## Quick Verdict

Evidence is too thin for a benchmark verdict: GPT-5.3 Codex and MiMo-V2.6-Pro 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-V2.6-Pro has the lower published output-token price.
- MiMo-V2.6-Pro has the larger published context window at 1M.

## Model Snapshot

| Property | GPT-5.3 Codex | MiMo-V2.6-Pro |
|----------|----------|----------|
| Creator | OpenAI | Xiaomi |
| Type | Proprietary | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 400K | 1M |
| Independent public score (not head-to-head) | 64.09 | null |
| Benchmarks Covered | 10 | 12 |
| Pricing (input/output) | $1.75 / $14.00 | $0.435 / $0.87 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- GPT-5.3 Codex public-lane score: 61.6 (Estimated · #15/154)
- MiMo-V2.6-Pro public-lane score: Coming soon

| Benchmark | GPT-5.3 Codex | MiMo-V2.6-Pro | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 77.3% | Coming soon | Coming soon |
| OSWorld-Verified | 64.7% | 82% | MiMo-V2.6-Pro |
| Gert Labs | 57.47% | Coming soon | Coming soon |
| JobBench | 33.7% | 62.0% | MiMo-V2.6-Pro |
| Toolathlon-Verified | Coming soon | 76.9% | Coming soon |
| AutomationBench | Coming soon | 53.1% | Coming soon |
| Agents' Last Exam | Coming soon | 31.6% | Coming soon |
| Terminal-Bench 4.0 | Coming soon | 34.90% | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 89.9% | Coming soon |
| CyberGym | Coming soon | 94.0% | Coming soon |
| ExploitGym | Coming soon | 17.8% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- GPT-5.3 Codex public-lane score: 62.2 (Supported · #18/156)
- MiMo-V2.6-Pro public-lane score: Coming soon

| Benchmark | GPT-5.3 Codex | MiMo-V2.6-Pro | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 85% | Coming soon | Coming soon |
| SWE-bench Pro | 56.8% | Coming soon | Coming soon |
| SWE-Rebench | 58.2% | Coming soon | Coming soon |
| Vibe Code Bench | 61.77% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 87.3% | Coming soon | Coming soon |
| SWE-bench (Vals) | 78.0% | Coming soon | Coming soon |
| DeepSWE | Coming soon | 71.9% | Coming soon |
| ProgramBench | Coming soon | 26.5% | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 89.9% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- GPT-5.3 Codex public-lane score: 78.3 (Unranked · 2 rankable rows)
- MiMo-V2.6-Pro public-lane score: Coming soon

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- GPT-5.3 Codex public-lane score: 75.7 (Unranked · 1 rankable row)
- MiMo-V2.6-Pro public-lane score: Coming soon

### Knowledge

- Winner: Insufficient shared evidence
- GPT-5.3 Codex public-lane score: 65.7 (Estimated · #22/186)
- MiMo-V2.6-Pro public-lane score: Coming soon

### Instruction Following

- Winner: Insufficient shared evidence
- GPT-5.3 Codex public-lane score: 91.2 (#14/124)
- MiMo-V2.6-Pro public-lane score: Coming soon

## FAQ

### Is there enough evidence to pick between GPT-5.3 Codex and MiMo-V2.6-Pro?

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-5.3 Codex vs GPT-5.3-Codex-Spark](/compare/gpt-5-3-codex-vs-gpt-5-3-codex-spark)
- [MiMo-V2.6-Pro vs GPT-5.3-Codex-Spark](/compare/gpt-5-3-codex-spark-vs-mimo-v2-6-pro)
- [GPT-5.3 Codex vs MiMo-V2.6-Flash](/compare/gpt-5-3-codex-vs-mimo-v2-6-flash)
- [MiMo-V2.6-Pro vs MiMo-V2.6-Flash](/compare/mimo-v2-6-flash-vs-mimo-v2-6-pro)

## Explore More

- [GPT-5.3 Codex profile](/models/gpt-5-3-codex)
- [MiMo-V2.6-Pro profile](/models/mimo-v2-6-pro)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)