GLM 5.3 is 10.3× cheaper per million tokens (blended). GLM 5.3 has the larger context window (1,048,576 vs 1,000,000 tokens). GLM 5.3 is open-weights; the other is not.
Claude Fable 5 vs GLM 5.3
Live catalog fields. Best-in-row is highlighted.
Claude Fable 5
Anthropic · anthropic__claude-fable-5
GLM 5.3open
Z.ai · z-ai__glm-5.3
Identity
| Field | anthropic__claude-fable-5 | z-ai__glm-5.3 |
|---|---|---|
| Provider | Anthropic | Z.ai |
| Slug | anthropic__claude-fable-5 | z-ai__glm-5.3 |
| Status | live | live |
| Open weights | No | Yes |
| License | — | — |
| HuggingFace | — | zai-org/GLM-5.3 |
Quality
| Field | anthropic__claude-fable-5 | z-ai__glm-5.3 |
|---|---|---|
| Quality index (0–100) | 91.1 | — |
Cost
| Field | anthropic__claude-fable-5 | z-ai__glm-5.3 |
|---|---|---|
| Input $ / 1M tokens | $10.00 | $1.40 |
| Cached input $ / 1M | $1.00 | $0.14 |
| Output $ / 1M tokens | $50.00 | $4.40 |
Context
| Field | anthropic__claude-fable-5 | z-ai__glm-5.3 |
|---|---|---|
| Max context tokens | 1,000,000 | 1,048,576 |
| Max output tokens | 128,000 | 262,144 |
Modalities
| Field | anthropic__claude-fable-5 | z-ai__glm-5.3 |
|---|---|---|
| Input | text, image, file | text |
| Output | text | text |