Claude Sonnet 5.5 vs Qwen3.8-27B: Specs & Benchmark Comparison
Claude Sonnet 5.5 is developed by Anthropic, while Qwen3.8-27B comes from Alibaba. Qwen3.8-27B was released in August 2026, and Claude Sonnet 5.5 followed a month later in September 2026. Qwen3.8-27B has a published size of about 28 billion parameters; Anthropic has not disclosed the parameter count of Claude Sonnet 5.5.
The two models share 3 published benchmarks. Claude Sonnet 5.5 leads on 3 of them. The widest gaps are on DeepSWE 1.1, where Claude Sonnet 5.5 scores 71.0% against 42.2%; SWE-Bench Pro, where Claude Sonnet 5.5 scores 81.3% against 61.7%. Averaged across everything we track, Claude Sonnet 5.5 sits at 67.4% and Qwen3.8-27B at 66.3%.
Claude Sonnet 5.5 is available through an API at $2 per million input tokens with a 1M-token context window. We do not track a hosted API for Qwen3.8-27B, so pricing and context cannot be compared directly.
| Characteristic | Claude Sonnet 5.5 | Qwen3.8-27B |
|---|---|---|
| Company | Anthropic | Alibaba |
| Release Date | September 28, 2026 | August 14, 2026 |
| Parameters | — | 28B |
| Multimodal | Yes | Yes |
| Context (input) | 1.0M | — |
| Context (output) | 128K | — |
| Input Price / 1M | $2.00 | — |
| Output Price / 1M | $10.00 | — |
| Average Score | 67.4% | 66.3% |
| Benchmarks | ||
| DeepSWE 1.1 | 71.0% | 42.2% |
| SWE-Bench Pro | 81.3% | 61.7% |
| SWE-Bench Multimodal | 54.3% | 38.6% |
Visual Benchmark Comparison
Verdict
Claude Sonnet 5.5 leads in 1 out of 2 comparison categories.
Both models show comparable average scores: Claude Sonnet 5.5 — 0.7, Qwen3.8-27B — 0.7.
Claude Sonnet 5.5 is newer: released 9/28/2026 vs 8/14/2026.
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Frequently Asked Questions
Which is better for coding — Claude Sonnet 5.5 or Qwen3.8-27B?
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The Claude Sonnet 5.5 and Qwen3.8-27B 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 5.5 or Qwen3.8-27B page. See also the complete list of AI model comparisons.