Claude Fable 5 vs GLM-5.3
Rank, tier, score and price side by side, from our weekly rankings. Scores are editorial opinion based on public sources.
A
Claude Fable 5
B
GLM-5.3
- ProviderAnthropicZ.ai
- Rank#12Higher rank#14
- TierSS
- Score87.0Higher score86.3
- Price$10 / $50 per 1M tokens (in/out)Open weights (GLM-5.3 License); API $1.40 input / $4.40 output per 1M tokens via Z.aiLower price tier
- TaglineAnthropic's June 2026 Fable model for demanding reasoning and long-horizon agentic work, now a legacy model succeeded by Fable 5.1 (September 2026).Z.ai's open-weight flagship with a 1M-token context window for long-horizon work.
| Attribute | Claude Fable 5 | GLM-5.3 |
|---|---|---|
| Provider | Anthropic | Z.ai |
| Rank | #12Higher rank | #14 |
| Tier | S | S |
| Score | 87.0Higher score | 86.3 |
| Price | $10 / $50 per 1M tokens (in/out) | Open weights (GLM-5.3 License); API $1.40 input / $4.40 output per 1M tokens via Z.aiLower price tier |
| Tagline | 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). | Z.ai's open-weight flagship with a 1M-token context window for long-horizon work. |