# Grok 4.5 vs Qwen3.5 Flash

> Side-by-side benchmark comparison for Grok 4.5 and Qwen3.5 Flash across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/grok-4-5-vs-qwen3-5-flash
- Last updated: October 7, 2026

- Shared sourced benchmarks: 4
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Grok 4.5 leads by point estimate. Conditional score ranges do not establish rank confidence. Choose using the category evidence and your own workload tests.

## Summary

- Grok 4.5 has the higher overall point estimate 63.97 to 43.55. Conditional score ranges do not establish rank confidence.
- The clearest category separation is in coding, where the averages are 57.7 for Grok 4.5 and 26.2 for Qwen3.5 Flash.
- The biggest single benchmark swing is SWE-bench (Vals) in Coding, with scores of 86.6% and 64.4%.
- Qwen3.5 Flash is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- Qwen3.5 Flash also has the larger context window at 1M.

## Model Snapshot

| Property | Grok 4.5 | Qwen3.5 Flash |
|----------|----------|----------|
| Creator | xAI | Alibaba |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 500K | 1M |
| Overall Score | 63.97 | 43.55 |
| Benchmarks Covered | 17 | 6 |
| Pricing (input/output) | $2.00 / $6.00 | $0.10 / $0.40 |

## Category Breakdown

### Agentic

- Winner: Not comparable
- Grok 4.5 public-lane score: 57.6 (Supported · #29/122)
- Qwen3.5 Flash public-lane score: Coming soon

| Benchmark | Grok 4.5 | Qwen3.5 Flash | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 3.0 | 15.7% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | 83.3% | Coming soon | Coming soon |
| deepSwe | 53% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 67.8% | Coming soon | Coming soon |

### Coding

- Winner: Directional only
- Grok 4.5 public-lane score: 57.7 (Supported · #27/146)
- Qwen3.5 Flash public-lane score: 26.2 (Estimated · #103/146)

| Benchmark | Grok 4.5 | Qwen3.5 Flash | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Pro | 64.7% | Coming soon | Coming soon |
| SWE Multilingual | 78% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | 83.3% | Coming soon | Coming soon |
| CursorBench 3.2 | 66.7% | Coming soon | Coming soon |
| VulcanBench v3 | 89.9% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 87.4% | 83.3% | Grok 4.5 |
| SWE-bench (Vals) | 86.6% | 64.4% | Grok 4.5 |
| PostTrainBench v1.1 | 23.4% | Coming soon | Coming soon |

### Reasoning

- Winner: Not comparable
- Grok 4.5 public-lane score: 50.4 (#28/28)
- Qwen3.5 Flash public-lane score: Coming soon

| Benchmark | Grok 4.5 | Qwen3.5 Flash | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-2 | 52.6% | Coming soon | Coming soon |
| ARC-AGI-3 | 0.3% | Coming soon | Coming soon |
| ARC-AGI-1 | 85.67% | Coming soon | Coming soon |

### Multimodal & Grounded

- Winner: Not comparable
- Grok 4.5 public-lane score: 79.5 (Unranked · 1 rankable row)
- Qwen3.5 Flash public-lane score: Coming soon

### Knowledge

- Winner: Directional only
- Grok 4.5 public-lane score: 67 (Supported · #19/174)
- Qwen3.5 Flash public-lane score: 44 (Estimated · #88/174)

| Benchmark | Grok 4.5 | Qwen3.5 Flash | Winner |
|-----------|-----------|-----------|--------|
| GPQA Diamond (Vals) | 92.9% | 82.8% | Grok 4.5 |
| MMLU-Pro (Vals) | 89.2% | 84.1% | Grok 4.5 |

### Mathematics

- Winner: Not comparable
- Grok 4.5 public-lane score: Coming soon
- Qwen3.5 Flash public-lane score: 28.4 (Unranked · 2 rankable rows)

| Benchmark | Grok 4.5 | Qwen3.5 Flash | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | Coming soon | 6.207% | Coming soon |
| FrontierMath v2 (Tier 4) | Coming soon | 0.000% | Coming soon |

## FAQ

### Which is better overall, Grok 4.5 or Qwen3.5 Flash?

Grok 4.5 has the higher overall point estimate. Conditional score ranges do not establish rank confidence.

### Where is the biggest gap between Grok 4.5 and Qwen3.5 Flash?

The widest category gap is in coding, where the averages are 57.7 for Grok 4.5 and 26.2 for Qwen3.5 Flash.

### How many benchmarks does Grok 4.5 cover on BenchLM?

Grok 4.5 currently has 17 sourced benchmark scores on BenchLM.

### How many benchmarks does Qwen3.5 Flash cover on BenchLM?

Qwen3.5 Flash currently has 6 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Grok 4.5 vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-grok-4-5)
- [Qwen3.5 Flash vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-qwen3-5-flash)
- [Grok 4.5 vs GPT-6 Astra](/compare/gpt-6-astra-vs-grok-4-5)
- [Qwen3.5 Flash vs GPT-6 Astra](/compare/gpt-6-astra-vs-qwen3-5-flash)

## Explore More

- [Grok 4.5 profile](/models/grok-4-5)
- [Qwen3.5 Flash profile](/models/qwen3-5-flash)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)