Claude Fable 5 vs GLM-5
Benchmarks, API pricing and specs, head to head. Data updated 2026-06-10.
Anthropic · Jun 2026
The first GA model of Anthropic's Mythos class — a tier above Opus — and the current SWE-bench Verified leader, at $10/$50 per 1M tokens.
Z.ai (Zhipu) · Feb 2026
Z.ai's 744B open-weights MoE — within ~4 points of Opus 4.6 on SWE-bench Verified at $1/$3.20 per million tokens.
The verdict
Claude Fable 5 wins 1 of the 1 benchmarks these models share, against 0 for GLM-5. On price the gap is dramatic: GLM-5 works out roughly 13x cheaper per blended million tokens. Claude Fable 5 also takes 1M of context versus 200K for GLM-5. And GLM-5 is open-weights (MIT), so it can be self-hosted — a structural advantage if data control or vendor independence matters.
Benchmark head-to-head 1–0
Specs & pricing
| Claude Fable 5 | GLM-5 | |
|---|---|---|
| modhub Index | — | — |
| Input price / 1M | $10 | $1 |
| Output price / 1M | $50 | $3.2 |
| Context window | 1M | 200K |
| Max output | 128K | 128K |
| Open weights | no | yes (MIT) |
| Reasoning model | yes | yes |
| Multimodal input | text, image | text |
| Knowledge cutoff | Jan 2026 | Dec 2025 |
| Released | Jun 2026 | Feb 2026 |
| Example monthly cost* | $175.00 | $14.80 |
* 10M input + 1.5M output tokens per month at list prices, no caching. Green = better value on that row.
Frequently asked questions
- Which is better, Claude Fable 5 or GLM-5?
- Claude Fable 5 wins 1 of the 1 benchmarks these models share, against 0 for GLM-5. On price the gap is dramatic: GLM-5 works out roughly 13x cheaper per blended million tokens. Claude Fable 5 also takes 1M of context versus 200K for GLM-5. And GLM-5 is open-weights (MIT), so it can be self-hosted — a structural advantage if data control or vendor independence matters.
- Which is cheaper, Claude Fable 5 or GLM-5?
- Claude Fable 5 costs $10/$50 per million input/output tokens, while GLM-5 costs $1/$3.2. For a typical workload of 10M input and 1.5M output tokens per month, that's $175.00 versus $14.80.
- Which model is better for coding, Claude Fable 5 or GLM-5?
- On SWE-bench Verified — the standard agentic-coding benchmark — Claude Fable 5 scores ~95% versus ~77.8% for GLM-5, making Claude Fable 5 the stronger pick for coding agents.