GLM-5.3 vs Claude Fable 5
Rank, tier, score and price side by side, from our weekly rankings. Scores are editorial opinion based on public sources.
A
GLM-5.3
B
Claude Fable 5
- ProviderZ.aiAnthropic
- Rank#14#12Higher rank
- TierSS
- Score86.387.0Higher score
- PriceOpen weights (GLM-5.3 License); API $1.40 input / $4.40 output per 1M tokens via Z.aiLower price tier$10 / $50 per 1M tokens (in/out)
- TaglineZ.ai's open-weight flagship with a 1M-token context window for long-horizon work.Anthropic's June 2026 Fable model for demanding reasoning and long-horizon agentic work, now a legacy model succeeded by Fable 5.1 (September 2026).
| Attribute | GLM-5.3 | Claude Fable 5 |
|---|---|---|
| Provider | Z.ai | Anthropic |
| Rank | #14 | #12Higher rank |
| Tier | S | S |
| Score | 86.3 | 87.0Higher score |
| Price | Open weights (GLM-5.3 License); API $1.40 input / $4.40 output per 1M tokens via Z.aiLower price tier | $10 / $50 per 1M tokens (in/out) |
| Tagline | Z.ai's open-weight flagship with a 1M-token context window for long-horizon work. | Anthropic's June 2026 Fable model for demanding reasoning and long-horizon agentic work, now a legacy model succeeded by Fable 5.1 (September 2026). |