# GPT-5.3 Codex vs Qwen3.6-27B

> Side-by-side benchmark comparison for GPT-5.3 Codex and Qwen3.6-27B across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gpt-5-3-codex-vs-qwen3-6-27b
- Last updated: September 4, 2026

- Shared sourced benchmarks: 4
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

Pick GPT-5.3 Codex if you want the stronger benchmark profile. Qwen3.6-27B 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 65.22 to 52.73.
- The clearest category separation is in agentic, where the averages are 62.3 for GPT-5.3 Codex and 33.9 for Qwen3.6-27B.
- The biggest single benchmark swing is Terminal-Bench 2.0 in Agentic, with scores of 77.3% and 59.3%.
- Qwen3.6-27B is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- GPT-5.3 Codex also has the larger context window at 400K.

## Model Snapshot

| Property | GPT-5.3 Codex | Qwen3.6-27B |
|----------|----------|----------|
| Creator | OpenAI | Alibaba |
| Type | Proprietary | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 400K | 262K |
| Overall Score | 65.22 | 52.73 |
| Benchmarks Covered | 8 | 38 |
| Pricing (input/output) | $1.75 / $14.00 | $0.00 / $0.00 |

## Category Breakdown

### Agentic

- Winner: Coming soon
- GPT-5.3 Codex public-lane score: 62.3 (Estimated · #19/151)
- Qwen3.6-27B public-lane score: 33.9 (Supported · #133/151)

| Benchmark | GPT-5.3 Codex | Qwen3.6-27B | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 77.3% | 59.3% | GPT-5.3 Codex |
| OSWorld-Verified | 64.7% | Coming soon | Coming soon |
| Gert Labs | 57.47% | 54.84% | GPT-5.3 Codex |
| JobBench | 33.7% | Coming soon | Coming soon |
| Claw-Eval | Coming soon | 72.4% | Coming soon |
| QwenClawBench | Coming soon | 53.4% | Coming soon |
| QwenWebBench | Coming soon | 1487 | Coming soon |
| AndroidWorld | Coming soon | 70.3% | Coming soon |

### Coding

- Winner: GPT-5.3 Codex
- GPT-5.3 Codex public-lane score: 62.7 (Supported · #16/183)
- Qwen3.6-27B public-lane score: 42.6 (Supported · #128/183)

| Benchmark | GPT-5.3 Codex | Qwen3.6-27B | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 85% | 77.2% | GPT-5.3 Codex |
| SWE-bench Pro | 56.8% | 53.5% | GPT-5.3 Codex |
| SWE-Rebench | 58.2% | Coming soon | Coming soon |
| Vibe Code Bench | 61.77% | Coming soon | Coming soon |
| SWE Multilingual | Coming soon | 71.3% | Coming soon |
| Terminal-Bench 2.0 | Coming soon | 59.3% | Coming soon |
| LiveCodeBench | Coming soon | 83.9% | Coming soon |
| NL2Repo | Coming soon | 36.2% | Coming soon |

### Multimodal & Grounded

- Winner: Coming soon
- GPT-5.3 Codex public-lane score: 75.4 (Unranked · 1 rankable row)
- Qwen3.6-27B public-lane score: 51.5 (#35/48)

| Benchmark | GPT-5.3 Codex | Qwen3.6-27B | Winner |
|-----------|-----------|-----------|--------|
| MMMU | Coming soon | 82.9% | Coming soon |
| MMMU-Pro | Coming soon | 75.8% | Coming soon |
| RealWorldQA | Coming soon | 84.1% | Coming soon |
| DynaMath | Coming soon | 85.6% | Coming soon |
| MStar | Coming soon | 81.4% | Coming soon |
| SimpleVQA | Coming soon | 56.1% | Coming soon |
| CharXiv | Coming soon | 78.4% | Coming soon |
| CC-OCR | Coming soon | 81.2% | Coming soon |
| CountBench | Coming soon | 97.8% | Coming soon |
| RefCOCO (avg) | Coming soon | 92.5% | Coming soon |
| ERQA | Coming soon | 62.5% | Coming soon |
| Video-MME (with subtitle) | Coming soon | 87.7% | Coming soon |
| VideoMMMU | Coming soon | 84.4% | Coming soon |
| MLVU (M-Avg) | Coming soon | 86.6% | Coming soon |
| V* | Coming soon | 94.7% | Coming soon |

### Reasoning

- Winner: Coming soon
- GPT-5.3 Codex public-lane score: 77.3 (Unranked · 2 rankable rows)
- Qwen3.6-27B public-lane score: 73.7 (Unranked · 2 rankable rows)

### Knowledge

- Winner: Coming soon
- GPT-5.3 Codex public-lane score: 66.3 (Estimated · #22/181)
- Qwen3.6-27B public-lane score: 49 (Estimated · #95/181)

| Benchmark | GPT-5.3 Codex | Qwen3.6-27B | Winner |
|-----------|-----------|-----------|--------|
| MMLU-Pro | Coming soon | 86.2% | Coming soon |
| MMLU-Redux | Coming soon | 93.5% | Coming soon |
| SuperGPQA | Coming soon | 66% | Coming soon |
| C-Eval | Coming soon | 91.4% | Coming soon |
| GPQA | Coming soon | 87.8% | Coming soon |
| HLE | Coming soon | 24% | Coming soon |

### Instruction Following

- Winner: Coming soon
- GPT-5.3 Codex public-lane score: 92.3 (#15/120)
- Qwen3.6-27B public-lane score: 82.2 (#50/120)

### Mathematics

- Winner: Coming soon
- GPT-5.3 Codex public-lane score: Coming soon
- Qwen3.6-27B public-lane score: 72.8 (Unranked · 5 rankable rows)

| Benchmark | GPT-5.3 Codex | Qwen3.6-27B | Winner |
|-----------|-----------|-----------|--------|
| HMMT Feb 2025 | Coming soon | 93.8% | Coming soon |
| HMMT Nov 2025 | Coming soon | 90.7% | Coming soon |
| HMMT Feb 2026 | Coming soon | 84.3% | Coming soon |
| MMAnswerBench | Coming soon | 80.8% | Coming soon |
| AIME26 | Coming soon | 94.1% | Coming soon |

## FAQ

### Which is better overall, GPT-5.3 Codex or Qwen3.6-27B?

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

### Where is the biggest gap between GPT-5.3 Codex and Qwen3.6-27B?

The widest category gap is in agentic, where the averages are 62.3 for GPT-5.3 Codex and 33.9 for Qwen3.6-27B.

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

GPT-5.3 Codex currently has 8 sourced benchmark scores on BenchLM.

### How many benchmarks does Qwen3.6-27B cover on BenchLM?

Qwen3.6-27B currently has 38 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)
- [Qwen3.6-27B vs GPT-5.3-Codex-Spark](/compare/gpt-5-3-codex-spark-vs-qwen3-6-27b)
- [GPT-5.3 Codex vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-gpt-5-3-codex)
- [Qwen3.6-27B vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-qwen3-6-27b)

## Explore More

- [GPT-5.3 Codex profile](/models/gpt-5-3-codex)
- [Qwen3.6-27B profile](/models/qwen3-6-27b)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)