# GPT-5.3 Codex vs MiMo-V2-Omni

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

- Canonical page: https://benchlm.ai/compare/gpt-5-3-codex-vs-mimo-v2-omni
- Last updated: September 15, 2026

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

## Quick Verdict

Evidence is too thin for a benchmark verdict: GPT-5.3 Codex and MiMo-V2-Omni 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.
- GPT-5.3 Codex has the larger published context window at 400K.

## Model Snapshot

| Property | GPT-5.3 Codex | MiMo-V2-Omni |
|----------|----------|----------|
| Creator | OpenAI | Xiaomi |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 400K | 262K |
| Independent public score (not head-to-head) | 64.19 | 57.78 |
| Benchmarks Covered | 8 | 2 |
| Pricing (input/output) | $1.75 / $14.00 | N/A |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- GPT-5.3 Codex public-lane score: 61.6 (Estimated · #15/153)
- MiMo-V2-Omni public-lane score: Coming soon

| Benchmark | GPT-5.3 Codex | MiMo-V2-Omni | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 77.3% | Coming soon | Coming soon |
| OSWorld-Verified | 64.7% | Coming soon | Coming soon |
| Gert Labs | 57.47% | Coming soon | Coming soon |
| JobBench | 33.7% | Coming soon | Coming soon |
| Claw-Eval | Coming soon | 45.2% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- GPT-5.3 Codex public-lane score: 62 (Estimated · #17/152)
- MiMo-V2-Omni public-lane score: Coming soon

| Benchmark | GPT-5.3 Codex | MiMo-V2-Omni | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 85% | 74.8% | GPT-5.3 Codex |
| 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 |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- GPT-5.3 Codex public-lane score: 75.6 (Unranked · 1 rankable row)
- MiMo-V2-Omni public-lane score: 63 (Unranked · 1 rankable row)

### Reasoning

- Winner: Insufficient shared evidence
- GPT-5.3 Codex public-lane score: 78.3 (Unranked · 2 rankable rows)
- MiMo-V2-Omni public-lane score: 72.6 (Unranked · 2 rankable rows)

### Knowledge

- Winner: Insufficient shared evidence
- GPT-5.3 Codex public-lane score: 65.6 (Estimated · #23/183)
- MiMo-V2-Omni public-lane score: 49.5 (Estimated · #84/183)

### Instruction Following

- Winner: Insufficient shared evidence
- GPT-5.3 Codex public-lane score: 92.6 (#15/123)
- MiMo-V2-Omni public-lane score: 64.1 (#70/123)

## FAQ

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

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-5.3 Codex vs GPT-5.3-Codex-Spark](/compare/gpt-5-3-codex-vs-gpt-5-3-codex-spark)
- [MiMo-V2-Omni vs GPT-5.3-Codex-Spark](/compare/gpt-5-3-codex-spark-vs-mimo-v2-omni)
- [GPT-5.3 Codex vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-gpt-5-3-codex)
- [MiMo-V2-Omni vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-mimo-v2-omni)

## Explore More

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