Claude Sonnet 5 vs Qwen3.8 Flash: Specs & Benchmark Comparison
| Characteristic | Claude Sonnet 5 | Qwen3.8 Flash |
|---|---|---|
| Company | Anthropic | Alibaba |
| Release Date | June 30, 2026 | August 26, 2026 |
| Parameters | — | 125B |
| Multimodal | Yes | Yes |
| Context (input) | 1.0M | 1.0M |
| Context (output) | 64K | 131K |
| Input Price / 1M | $2.00 | $0.15 |
| Output Price / 1M | $10.00 | $0.47 |
| Average Score | 0.6 | 0.7 |
| Benchmarks | ||
| Humanity's Last Exam | 0.6 | 0.4 |
| Toolathlon | 0.5 | 0.7 |
| DeepSWE 1.1 | 0.5 | 0.6 |
| SWE-bench Multilingual | 0.8 | 0.8 |
| CharXiv-R | 0.9 | 0.9 |
| SWE-Bench Pro | 0.6 | 0.6 |
Visual Benchmark Comparison
Claude Sonnet 5
Qwen3.8 Flash
Humanity's Last Exam0.6 vs 0.4
0.6
0.4
Toolathlon0.5 vs 0.7
0.5
0.7
DeepSWE 1.10.5 vs 0.6
0.5
0.6
SWE-bench Multilingual0.8 vs 0.8
0.8
0.8
CharXiv-R0.9 vs 0.9
0.9
0.9
SWE-Bench Pro0.6 vs 0.6
0.6
0.6
Verdict
Qwen3.8 Flash leads in 3 out of 4 comparison categories.
Overall Performance
Both models show comparable average scores: Claude Sonnet 5 — 0.6, Qwen3.8 Flash — 0.7.
API Cost
Qwen3.8 Flash is 19.4x cheaper: input $0.15/1M vs $2.00/1M tokens.
Context Window
Qwen3.8 Flash supports a larger context: 1M vs 1M tokens.
Recency
Qwen3.8 Flash is newer: released 8/26/2026 vs 6/30/2026.
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Frequently Asked Questions
Which is better for coding — Claude Sonnet 5 or Qwen3.8 Flash?
Direct comparison on the SWE-Bench benchmark is not available. We recommend reviewing other metrics on the comparison page.
Which model is cheaper — Claude Sonnet 5 or Qwen3.8 Flash?
Qwen3.8 Flash is cheaper for input: $0.15 per 1M tokens vs $2.00.
Which has a larger context window — Claude Sonnet 5 or Qwen3.8 Flash?
Qwen3.8 Flash supports a larger context: 1,048,576 tokens vs 1,000,000.
The Claude Sonnet 5 and Qwen3.8 Flash comparison is updated for 2026. Data includes benchmark results, API pricing, context window size and other specifications. For more detailed information, visit the Claude Sonnet 5 or Qwen3.8 Flash page. See also the complete list of AI model comparisons.