Claude Sonnet 5 vs GLM-5.1: Specs & Benchmark Comparison
| Characteristic | Claude Sonnet 5 | GLM-5.1 |
|---|---|---|
| Company | Anthropic | Zhipu AI |
| Release Date | June 30, 2026 | April 7, 2026 |
| Parameters | — | 754B |
| Multimodal | Yes | No |
| Context (input) | 1.0M | 200K |
| Context (output) | 64K | 131K |
| Input Price / 1M | $2.00 | $1.40 |
| Output Price / 1M | $10.00 | $4.40 |
| Average Score | 0.6 | 0.9 |
Verdict
Claude Sonnet 5 leads in 2 out of 4 comparison categories.
Overall Performance
Both models show comparable average scores: Claude Sonnet 5 — 0.6, GLM-5.1 — 0.9.
API Cost
GLM-5.1 is 2.1x cheaper: input $1.40/1M vs $2.00/1M tokens.
Context Window
Claude Sonnet 5 supports a larger context: 1M vs 200K tokens.
Recency
Claude Sonnet 5 is newer: released 6/30/2026 vs 4/7/2026.
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Frequently Asked Questions
Which is better for coding — Claude Sonnet 5 or GLM-5.1?
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 GLM-5.1?
GLM-5.1 is cheaper for input: $1.40 per 1M tokens vs $2.00.
Which has a larger context window — Claude Sonnet 5 or GLM-5.1?
Claude Sonnet 5 supports a larger context: 1,000,000 tokens vs 200,000.
The Claude Sonnet 5 and GLM-5.1 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 GLM-5.1 page. See also the complete list of AI model comparisons.