Claude Fable 5 vs GLM-5.3 Flash: Specs & Benchmark Comparison
| Characteristic | Claude Fable 5 | GLM-5.3 Flash |
|---|---|---|
| Company | Anthropic | Zhipu AI |
| Release Date | June 9, 2026 | August 26, 2026 |
| Parameters | — | 320B |
| Multimodal | Yes | Yes |
| Context (input) | 1.0M | 1.0M |
| Context (output) | 128K | 131K |
| Input Price / 1M | $10.00 | $0.15 |
| Output Price / 1M | $50.00 | $0.50 |
| Average Score | 0.6 | 0.6 |
| Benchmarks | ||
| AutomationBench | 0.2 | 0.5 |
| DeepSWE 1.1 | 0.7 | 0.6 |
| Terminal-Bench 2.1 | 0.8 | 0.8 |
Visual Benchmark Comparison
Claude Fable 5
GLM-5.3 Flash
AutomationBench0.2 vs 0.5
0.2
0.5
DeepSWE 1.10.7 vs 0.6
0.7
0.6
Terminal-Bench 2.10.8 vs 0.8
0.8
0.8
Verdict
GLM-5.3 Flash leads in 3 out of 4 comparison categories.
Overall Performance
Both models show comparable average scores: Claude Fable 5 — 0.6, GLM-5.3 Flash — 0.6.
API Cost
GLM-5.3 Flash is 92.3x cheaper: input $0.15/1M vs $10.00/1M tokens.
Context Window
GLM-5.3 Flash supports a larger context: 1M vs 1M tokens.
Recency
GLM-5.3 Flash is newer: released 8/26/2026 vs 6/9/2026.
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Frequently Asked Questions
Which is better for coding — Claude Fable 5 or GLM-5.3 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 Fable 5 or GLM-5.3 Flash?
GLM-5.3 Flash is cheaper for input: $0.15 per 1M tokens vs $10.00.
Which has a larger context window — Claude Fable 5 or GLM-5.3 Flash?
GLM-5.3 Flash supports a larger context: 1,048,576 tokens vs 1,000,000.
The Claude Fable 5 and GLM-5.3 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 Fable 5 or GLM-5.3 Flash page. See also the complete list of AI model comparisons.