# Claude Opus 4.5 vs Qwen3.8-Flash-Next

> Side-by-side benchmark comparison for Claude Opus 4.5 and Qwen3.8-Flash-Next across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-opus-4-5-vs-qwen3-8-flash-next
- Last updated: October 10, 2026

- Shared sourced benchmarks: 12
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Qwen3.8-Flash-Next leads by point estimate. Conditional score ranges do not establish rank confidence. Choose using the category evidence and your own workload tests.

## Summary

- Qwen3.8-Flash-Next has the higher overall point estimate 64.23 to 54.14. Conditional score ranges do not establish rank confidence.
- The clearest category separation is in instruction following, where the averages are 31.9 for Claude Opus 4.5 and 91.2 for Qwen3.8-Flash-Next.
- The biggest single benchmark swing is ERQA in Multimodal & Grounded, with scores of 46.8% and 72.3%.
- Qwen3.8-Flash-Next is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- Qwen3.8-Flash-Next also has the larger context window at 262K.

## Model Snapshot

| Property | Claude Opus 4.5 | Qwen3.8-Flash-Next |
|----------|----------|----------|
| Creator | Anthropic | Alibaba |
| Type | Proprietary | Open Weight |
| Reasoning | Non-Reasoning | Reasoning |
| Context | 200K | 262K |
| Overall Score | 54.14 | 64.23 |
| Benchmarks Covered | 61 | 24 |
| Pricing (input/output) | $5.00 / $25.00 | $0.00 / $0.00 |

## Category Breakdown

### Agentic

- Winner: Directional only
- Claude Opus 4.5 public-lane score: 31.2 (Estimated · #86/123)
- Qwen3.8-Flash-Next public-lane score: 59.5 (Estimated · #24/123)

| Benchmark | Claude Opus 4.5 | Qwen3.8-Flash-Next | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 59.3% | Coming soon | Coming soon |
| OSWorld-Verified | 66.3% | Coming soon | Coming soon |
| OSWorld | 66.3% | Coming soon | Coming soon |
| Claw-Eval | 59.6% | Coming soon | Coming soon |
| QwenClawBench | 52.3% | Coming soon | Coming soon |
| τ³-bench results | 70.2% | Coming soon | Coming soon |
| VITA-Bench | 23.3% | Coming soon | Coming soon |
| DeepPlanning | 26.4% | Coming soon | Coming soon |
| Toolathlon | 43.5% | Coming soon | Coming soon |
| MCP Atlas | 42.3% | Coming soon | Coming soon |
| MCP-Tasks | 71.8% | Coming soon | Coming soon |
| WideResearch | 76.4% | Coming soon | Coming soon |
| CyberGym | 50.6% | Coming soon | Coming soon |
| Gert Labs | 64.23% | Coming soon | Coming soon |
| JobBench | 32.3% | 55.7% | Qwen3.8-Flash-Next |
| CoWorkBench | Coming soon | 73.9% | Coming soon |
| Agents' Last Exam | Coming soon | 51.2% | Coming soon |
| Toolathlon-Verified | Coming soon | 73.5% | Coming soon |
| AndroidWorld | Coming soon | 84.5% | Coming soon |
| OSWorld 2.0 | Coming soon | 19.4% | Coming soon |

### Coding

- Winner: Directional only
- Claude Opus 4.5 public-lane score: 41.2 (Estimated · #61/146)
- Qwen3.8-Flash-Next public-lane score: 52.4 (Supported · #37/146)

| Benchmark | Claude Opus 4.5 | Qwen3.8-Flash-Next | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 80.9% | Coming soon | Coming soon |
| LiveCodeBench v6 | 84.8% | 91.9% | Qwen3.8-Flash-Next |
| SWE-bench Pro | 57.1% | 62.5% | Qwen3.8-Flash-Next |
| SWE Multilingual | 77.5% | 81% | Qwen3.8-Flash-Next |
| NL2Repo | 43.2% | 48.1% | Qwen3.8-Flash-Next |
| Terminal-Bench 2.0 | 59.3% | Coming soon | Coming soon |
| DeepSWE | Coming soon | 58.7% | Coming soon |

### Reasoning

- Winner: Not comparable
- Claude Opus 4.5 public-lane score: 78.4 (Unranked · 4 rankable rows)
- Qwen3.8-Flash-Next public-lane score: 80.9 (Unranked · 2 rankable rows)

| Benchmark | Claude Opus 4.5 | Qwen3.8-Flash-Next | Winner |
|-----------|-----------|-----------|--------|
| LongBench v2 | 64.4% | Coming soon | Coming soon |
| AI-Needle | 74% | Coming soon | Coming soon |

### Multimodal & Grounded

- Winner: Directional only
- Claude Opus 4.5 public-lane score: 48.6 (#49/54)
- Qwen3.8-Flash-Next public-lane score: 87.7 (#8/54)

| Benchmark | Claude Opus 4.5 | Qwen3.8-Flash-Next | Winner |
|-----------|-----------|-----------|--------|
| MMMU | 80.7% | Coming soon | Coming soon |
| MMMU-Pro | 70.6% | Coming soon | Coming soon |
| RealWorldQA | 77.0% | 88.5% | Qwen3.8-Flash-Next |
| OmniDocBench 1.5 | 87.7% | Coming soon | Coming soon |
| Video-MME (with subtitle) | 77.6% | Coming soon | Coming soon |
| Video-MME (w/o subtitle) | 81.4% | Coming soon | Coming soon |
| MathVision | 74.3% | 90.6% | Qwen3.8-Flash-Next |
| We-Math | 70.0% | Coming soon | Coming soon |
| DynaMath | 79.7% | Coming soon | Coming soon |
| SimpleVQA | 65.7% | Coming soon | Coming soon |
| CharXiv | 68.5% | 90.6% | Qwen3.8-Flash-Next |
| CountBench | 90.6% | Coming soon | Coming soon |
| AI2D_TEST | 87.7% | Coming soon | Coming soon |
| ERQA | 46.8% | 72.3% | Qwen3.8-Flash-Next |
| VideoMMMU | 84.4% | Coming soon | Coming soon |
| MLVU (M-Avg) | 81.7% | Coming soon | Coming soon |
| ScreenSpot Pro | 45.7% | Coming soon | Coming soon |
| V* | 67.0% | Coming soon | Coming soon |
| Vision2Web | Coming soon | 64.0% | Coming soon |
| LVBench | Coming soon | 76.6% | Coming soon |
| MathVision w/ Python | Coming soon | 95.7% | Coming soon |
| CharXiv w/o tools | Coming soon | 84.6% | Coming soon |

### Knowledge

- Winner: Directional only
- Claude Opus 4.5 public-lane score: 51.1 (Estimated · #71/177)
- Qwen3.8-Flash-Next public-lane score: 59.4 (Supported · #47/177)

| Benchmark | Claude Opus 4.5 | Qwen3.8-Flash-Next | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 87% | 91.7% | Qwen3.8-Flash-Next |
| SuperGPQA | 70.6% | Coming soon | Coming soon |
| MMLU-Pro | 89.5% | Coming soon | Coming soon |
| MMLU-Redux | 96.6% | Coming soon | Coming soon |
| C-Eval | 92.2% | Coming soon | Coming soon |
| HLE | 30.8% | 35.9% | Qwen3.8-Flash-Next |
| GPQA-D | Coming soon | 91.7% | Coming soon |
| HLE w/o tools | Coming soon | 35.9% | Coming soon |

### Multilingual

- Winner: Not comparable
- Claude Opus 4.5 public-lane score: 96.5 (#2/17)
- Qwen3.8-Flash-Next public-lane score: Coming soon

| Benchmark | Claude Opus 4.5 | Qwen3.8-Flash-Next | Winner |
|-----------|-----------|-----------|--------|
| MMLU-ProX | 85.7% | Coming soon | Coming soon |
| NOVA-63 | 56.7% | Coming soon | Coming soon |
| INCLUDE | 86.2% | Coming soon | Coming soon |
| PolyMath | 79.0% | Coming soon | Coming soon |
| MAXIFE | 79.2% | Coming soon | Coming soon |

### Instruction Following

- Winner: Qwen3.8-Flash-Next
- Claude Opus 4.5 public-lane score: 31.9 (#115/127)
- Qwen3.8-Flash-Next public-lane score: 91.2 (#22/127)

| Benchmark | Claude Opus 4.5 | Qwen3.8-Flash-Next | Winner |
|-----------|-----------|-----------|--------|
| IFEval | 90.9% | Coming soon | Coming soon |
| IFBench | 58% | 81.3% | Qwen3.8-Flash-Next |

### Mathematics

- Winner: Not comparable
- Claude Opus 4.5 public-lane score: 59 (#6/7)
- Qwen3.8-Flash-Next public-lane score: Coming soon

| Benchmark | Claude Opus 4.5 | Qwen3.8-Flash-Next | Winner |
|-----------|-----------|-----------|--------|
| AIME26 | 95.1% | Coming soon | Coming soon |
| HMMT Feb 2025 | 92.9% | Coming soon | Coming soon |
| HMMT Nov 2025 | 93.3% | Coming soon | Coming soon |
| HMMT Feb 2026 | 85.3% | Coming soon | Coming soon |
| MMAnswerBench | 84.0% | Coming soon | Coming soon |
| FrontierMath v2 (Tiers 1-3) | 20.690% | Coming soon | Coming soon |
| FrontierMath v2 (Tier 4) | 4.167% | Coming soon | Coming soon |

## FAQ

### Which is better overall, Claude Opus 4.5 or Qwen3.8-Flash-Next?

Qwen3.8-Flash-Next has the higher overall point estimate. Conditional score ranges do not establish rank confidence.

### Where is the biggest gap between Claude Opus 4.5 and Qwen3.8-Flash-Next?

The widest category gap is in instruction following, where the averages are 31.9 for Claude Opus 4.5 and 91.2 for Qwen3.8-Flash-Next.

### How many benchmarks does Claude Opus 4.5 cover on BenchLM?

Claude Opus 4.5 currently has 61 sourced benchmark scores on BenchLM.

### How many benchmarks does Qwen3.8-Flash-Next cover on BenchLM?

Qwen3.8-Flash-Next currently has 24 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Claude Opus 4.5 vs Claude Opus 4.5 Thinking](/compare/claude-opus-4-5-vs-claude-opus-4-5-thinking)
- [Qwen3.8-Flash-Next vs Claude Opus 4.5 Thinking](/compare/claude-opus-4-5-thinking-vs-qwen3-8-flash-next)
- [Claude Opus 4.5 vs Claude Opus 5.5](/compare/claude-opus-4-5-vs-claude-opus-5-5)
- [Qwen3.8-Flash-Next vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-qwen3-8-flash-next)

## Explore More

- [Claude Opus 4.5 profile](/models/claude-opus-4-5)
- [Qwen3.8-Flash-Next profile](/models/qwen3-8-flash-next)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)