# GPT-5.1-Codex vs Qwen3.6 Plus

> Side-by-side benchmark comparison for GPT-5.1-Codex and Qwen3.6 Plus across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gpt-5-1-codex-vs-qwen3-6-plus
- Last updated: September 4, 2026

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

## Quick Verdict

Evidence is too thin for a benchmark verdict: GPT-5.1-Codex and Qwen3.6 Plus 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.
- Qwen3.6 Plus has the lower published output-token price.
- Qwen3.6 Plus has the larger published context window at 1M.

## Model Snapshot

| Property | GPT-5.1-Codex | Qwen3.6 Plus |
|----------|----------|----------|
| Creator | OpenAI | Alibaba |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 400K | 1M |
| Independent public score (not head-to-head) | 51.62 | 61.49 |
| Benchmarks Covered | 3 | 48 |
| 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: 51.4 (Estimated · #54/151)
- Qwen3.6 Plus public-lane score: 36.4 (Supported · #128/151)

| Benchmark | GPT-5.1-Codex | Qwen3.6 Plus | Winner |
|-----------|-----------|-----------|--------|
| Gert Labs | 49.68% | 50.60% | Qwen3.6 Plus |
| JobBench | 26.2% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | Coming soon | 61.6% | Coming soon |
| Claw-Eval | Coming soon | 58.8% | Coming soon |
| QwenClawBench | Coming soon | 57.2% | Coming soon |
| τ³-bench results | Coming soon | 70.7% | Coming soon |
| VITA-Bench | Coming soon | 44.3% | Coming soon |
| DeepPlanning | Coming soon | 41.5% | Coming soon |
| Toolathlon | Coming soon | 39.8% | Coming soon |
| MCP Atlas | Coming soon | 48.2% | Coming soon |
| MCP-Tasks | Coming soon | 74.1% | Coming soon |
| WideResearch | Coming soon | 74.3% | Coming soon |
| ResearchClawBench | Coming soon | 18.0% | Coming soon |
| Terminal-Bench 2.1 (Vals) | Coming soon | 53.2% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- GPT-5.1-Codex public-lane score: 47.4 (Estimated · #89/183)
- Qwen3.6 Plus public-lane score: 47 (Supported · #92/183)

| Benchmark | GPT-5.1-Codex | Qwen3.6 Plus | Winner |
|-----------|-----------|-----------|--------|
| Vibe Code Bench | 13.12% | 25.56% | Qwen3.6 Plus |
| SWE-bench Verified | Coming soon | 78.8% | Coming soon |
| SWE-bench Pro | Coming soon | 56.6% | Coming soon |
| SWE Multilingual | Coming soon | 73.8% | Coming soon |
| LiveCodeBench v6 | Coming soon | 87.1% | Coming soon |
| LiveCodeBench (Vals) | Coming soon | 86.0% | Coming soon |
| SWE-bench (Vals) | Coming soon | 73.4% | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- GPT-5.1-Codex public-lane score: 66.8 (Unranked · 1 rankable row)
- Qwen3.6 Plus public-lane score: 66.3 (#22/48)

| Benchmark | GPT-5.1-Codex | Qwen3.6 Plus | Winner |
|-----------|-----------|-----------|--------|
| MMMU | Coming soon | 86.0% | Coming soon |
| MMMU-Pro | Coming soon | 78.8% | Coming soon |
| MathVision | Coming soon | 88.0% | Coming soon |
| VideoMMMU | Coming soon | 84.0% | Coming soon |
| ScreenSpot Pro | Coming soon | 68.2% | Coming soon |
| CharXiv | Coming soon | 81.5% | Coming soon |
| V* | Coming soon | 96.9% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- GPT-5.1-Codex public-lane score: 70.6 (Unranked · 2 rankable rows)
- Qwen3.6 Plus public-lane score: 59.3 (Unranked · 4 rankable rows)

| Benchmark | GPT-5.1-Codex | Qwen3.6 Plus | Winner |
|-----------|-----------|-----------|--------|
| AI-Needle | Coming soon | 68.3% | Coming soon |
| LongBench v2 | Coming soon | 62% | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- GPT-5.1-Codex public-lane score: 53.3 (Estimated · #69/181)
- Qwen3.6 Plus public-lane score: 54.7 (Supported · #63/181)

| Benchmark | GPT-5.1-Codex | Qwen3.6 Plus | Winner |
|-----------|-----------|-----------|--------|
| GPQA | Coming soon | 90.4% | Coming soon |
| SuperGPQA | Coming soon | 71.6% | Coming soon |
| MMLU-Pro | Coming soon | 88.5% | Coming soon |
| MMLU-Redux | Coming soon | 94.5% | Coming soon |
| C-Eval | Coming soon | 93.3% | Coming soon |
| HLE | Coming soon | 28.8% | Coming soon |
| GPQA Diamond (Vals) | Coming soon | 87.4% | Coming soon |
| MMLU-Pro (Vals) | Coming soon | 87.7% | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- GPT-5.1-Codex public-lane score: 85.3 (#42/120)
- Qwen3.6 Plus public-lane score: 85.5 (#41/120)

| Benchmark | GPT-5.1-Codex | Qwen3.6 Plus | Winner |
|-----------|-----------|-----------|--------|
| IFEval | Coming soon | 94.3% | Coming soon |
| IFBench | Coming soon | 75.8% | Coming soon |

### Multilingual

- Winner: Insufficient shared evidence
- GPT-5.1-Codex public-lane score: Coming soon
- Qwen3.6 Plus public-lane score: 69.7 (#4/12)

| Benchmark | GPT-5.1-Codex | Qwen3.6 Plus | Winner |
|-----------|-----------|-----------|--------|
| MMLU-ProX | Coming soon | 84.7% | Coming soon |
| NOVA-63 | Coming soon | 57.9% | Coming soon |

### Mathematics

- Winner: Insufficient shared evidence
- GPT-5.1-Codex public-lane score: Coming soon
- Qwen3.6 Plus public-lane score: 62.4 (#4/7)

| Benchmark | GPT-5.1-Codex | Qwen3.6 Plus | Winner |
|-----------|-----------|-----------|--------|
| AIME26 | Coming soon | 95.3% | Coming soon |
| HMMT Feb 2025 | Coming soon | 96.7% | Coming soon |
| HMMT Nov 2025 | Coming soon | 94.6% | Coming soon |
| HMMT Feb 2026 | Coming soon | 87.8% | Coming soon |
| MMAnswerBench | Coming soon | 83.8% | Coming soon |
| FrontierMath v2 (Tiers 1-3) | Coming soon | 26.207% | Coming soon |
| FrontierMath v2 (Tier 4) | Coming soon | 8.333% | Coming soon |

## FAQ

### Is there enough evidence to pick between GPT-5.1-Codex and Qwen3.6 Plus?

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 Claude Fable 5.1](/compare/claude-fable-5-1-vs-gpt-5-1-codex)
- [Qwen3.6 Plus vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-qwen3-6-plus)
- [GPT-5.1-Codex vs GPT-6 Astra](/compare/gpt-5-1-codex-vs-gpt-6-astra)
- [Qwen3.6 Plus vs GPT-6 Astra](/compare/gpt-6-astra-vs-qwen3-6-plus)

## Explore More

- [GPT-5.1-Codex profile](/models/gpt-5-1-codex)
- [Qwen3.6 Plus profile](/models/qwen3-6-plus)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)