# GPT-5.3 Codex vs MiniMax M3

> Side-by-side benchmark comparison for GPT-5.3 Codex and MiniMax M3 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gpt-5-3-codex-vs-minimax-m3
- Last updated: October 15, 2026

- Shared sourced benchmarks: 5
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Pick GPT-5.3 Codex if you want the stronger benchmark profile. MiniMax M3 only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- GPT-5.3 Codex leads overall 60.4 to 54.94.
- The clearest category separation is in multimodal & grounded, where the averages are 80.1 for GPT-5.3 Codex and 61.5 for MiniMax M3.
- The biggest single benchmark swing is OSWorld-Verified in Agentic, with scores of 64.7% and 70.1%.
- MiniMax M3 is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- MiniMax M3 also has the larger context window at 1M.

## Model Snapshot

| Property | GPT-5.3 Codex | MiniMax M3 |
|----------|----------|----------|
| Creator | OpenAI | MiniMax |
| Type | Proprietary | Open Weight |
| Reasoning | Reasoning | Non-Reasoning |
| Context | 400K | 1M |
| Overall Score | 60.4 | 54.94 |
| Benchmarks Covered | 11 | 27 |
| Pricing (input/output) | $1.75 / $14.00 | $0.30 / $1.20 |

## Category Breakdown

### Agentic

- Winner: Directional only
- GPT-5.3 Codex public-lane score: 55.6 (Estimated · #40/126)
- MiniMax M3 public-lane score: 39.4 (Supported · #67/126)

| Benchmark | GPT-5.3 Codex | MiniMax M3 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 77.3% | Coming soon | Coming soon |
| OSWorld-Verified | 64.7% | 70.1% | MiniMax M3 |
| Gert Labs | 57.47% | Coming soon | Coming soon |
| JobBench | 33.7% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 66.0% | Coming soon |
| BrowseComp | Coming soon | 83.5% | Coming soon |
| MCP Atlas | Coming soon | 74.2% | Coming soon |
| Claw-Eval | Coming soon | 74.5% | Coming soon |
| BankerToolBench | Coming soon | 76.1% | Coming soon |
| ResearchClawBench | Coming soon | 19.8% | Coming soon |
| OSWorld 2.0 | Coming soon | 4.6% | Coming soon |
| Terminal-Bench 2.1 (Vals) | Coming soon | 53.6% | Coming soon |

### Coding

- Winner: GPT-5.3 Codex
- GPT-5.3 Codex public-lane score: 53.6 (Supported · #35/149)
- MiniMax M3 public-lane score: 36.5 (Supported · #73/149)

| Benchmark | GPT-5.3 Codex | MiniMax M3 | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 85% | 80.5% | GPT-5.3 Codex |
| SWE-bench Pro | 56.8% | 59% | MiniMax M3 |
| SWE-Rebench | 58.2% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | 77.3% | Coming soon | Coming soon |
| Vibe Code Bench | 61.77% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 87.3% | 82.2% | GPT-5.3 Codex |
| SWE-bench (Vals) | 78.0% | 75.0% | GPT-5.3 Codex |
| Terminal-Bench 2.1 | Coming soon | 66.0% | Coming soon |
| NL2Repo | Coming soon | 42.1% | Coming soon |
| VIBE V2 | Coming soon | 50.1% | Coming soon |
| SVG-Bench | Coming soon | 63.7% | Coming soon |
| KernelBench Hard | Coming soon | 28.8% | Coming soon |
| OpenHarmony Bench | Coming soon | 48.4% | Coming soon |

### Reasoning

- Winner: Not comparable
- GPT-5.3 Codex public-lane score: 83.1 (Unranked · 2 rankable rows)
- MiniMax M3 public-lane score: 82.9 (#5/29)

### Multimodal & Grounded

- Winner: Not comparable
- GPT-5.3 Codex public-lane score: 80.1 (Unranked · 1 rankable row)
- MiniMax M3 public-lane score: 61.5 (#43/54)

| Benchmark | GPT-5.3 Codex | MiniMax M3 | Winner |
|-----------|-----------|-----------|--------|
| OfficeQA Pro | Coming soon | 45.1% | Coming soon |
| OmniDocBench 1.5 | Coming soon | 91.6% | Coming soon |
| MMMU-Pro | Coming soon | 78.1% | Coming soon |
| VideoMMMU | Coming soon | 84.6% | Coming soon |
| Video-MME (with subtitle) | Coming soon | 85.4% | Coming soon |

### Knowledge

- Winner: Directional only
- GPT-5.3 Codex public-lane score: 65.2 (Estimated · #33/182)
- MiniMax M3 public-lane score: 49.6 (Supported · #81/182)

| Benchmark | GPT-5.3 Codex | MiniMax M3 | Winner |
|-----------|-----------|-----------|--------|
| GPQA Diamond (Vals) | Coming soon | 92.7% | Coming soon |
| MMLU-Pro (Vals) | Coming soon | 84.2% | Coming soon |

### Instruction Following

- Winner: Directional only
- GPT-5.3 Codex public-lane score: 92.6 (#18/146)
- MiniMax M3 public-lane score: 93.8 (#5/146)

### Mathematics

- Winner: Not comparable
- GPT-5.3 Codex public-lane score: Coming soon
- MiniMax M3 public-lane score: Coming soon

| Benchmark | GPT-5.3 Codex | MiniMax M3 | Winner |
|-----------|-----------|-----------|--------|
| USAMO 2026 | Coming soon | 85.7% | Coming soon |

## FAQ

### Which is better overall, GPT-5.3 Codex or MiniMax M3?

GPT-5.3 Codex is ahead overall on BenchLM right now.

### Where is the biggest gap between GPT-5.3 Codex and MiniMax M3?

The widest category gap is in multimodal & grounded, where the averages are 80.1 for GPT-5.3 Codex and 61.5 for MiniMax M3.

### How many benchmarks does GPT-5.3 Codex cover on BenchLM?

GPT-5.3 Codex currently has 11 sourced benchmark scores on BenchLM.

### How many benchmarks does MiniMax M3 cover on BenchLM?

MiniMax M3 currently has 27 sourced benchmark scores on BenchLM.

## Related Comparisons

- [GPT-5.3 Codex vs GPT-5.3-Codex-Spark](/compare/gpt-5-3-codex-vs-gpt-5-3-codex-spark)
- [MiniMax M3 vs GPT-5.3-Codex-Spark](/compare/gpt-5-3-codex-spark-vs-minimax-m3)
- [GPT-5.3 Codex vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-gpt-5-3-codex)
- [MiniMax M3 vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-minimax-m3)

## Explore More

- [GPT-5.3 Codex profile](/models/gpt-5-3-codex)
- [MiniMax M3 profile](/models/minimax-m3)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)