GLM-4.6 vs Grok Code Fast 1
Benchmarks, API pricing and specs, head to head. Data updated 2026-06-10.
Z.ai (Zhipu) · Sep 2025
The budget coding-agent favorite of late 2025 — near-Sonnet coding utility with MIT weights and a $3/month plan.
xAI · Aug 2025
A speed-first coding model built for agentic IDE loops, popular as a cheap fast tier in Cursor and similar tools.
The verdict
Grok Code Fast 1 wins 1 of the 1 benchmarks these models share, against 0 for GLM-4.6. Grok Code Fast 1 is about 1.9x cheaper per blended million tokens (3:1 input:output mix). Grok Code Fast 1 also takes 256K of context versus 200K for GLM-4.6. And GLM-4.6 is open-weights (MIT), so it can be self-hosted — a structural advantage if data control or vendor independence matters.
Benchmark head-to-head 0–1
Specs & pricing
| GLM-4.6 | Grok Code Fast 1 | |
|---|---|---|
| modhub Index | 63.9 | — |
| Input price / 1M | $0.6 | $0.2 |
| Output price / 1M | $2.2 | $1.5 |
| Context window | 200K | 256K |
| Max output | 128K | — |
| Open weights | yes (MIT) | no |
| Reasoning model | yes | yes |
| Multimodal input | text | text |
| Knowledge cutoff | Jul 2025 | Aug 2025 |
| Released | Sep 2025 | Aug 2025 |
| Example monthly cost* | $9.30 | $4.25 |
* 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, GLM-4.6 or Grok Code Fast 1?
- Grok Code Fast 1 wins 1 of the 1 benchmarks these models share, against 0 for GLM-4.6. Grok Code Fast 1 is about 1.9x cheaper per blended million tokens (3:1 input:output mix). Grok Code Fast 1 also takes 256K of context versus 200K for GLM-4.6. And GLM-4.6 is open-weights (MIT), so it can be self-hosted — a structural advantage if data control or vendor independence matters.
- Which is cheaper, GLM-4.6 or Grok Code Fast 1?
- GLM-4.6 costs $0.6/$2.2 per million input/output tokens, while Grok Code Fast 1 costs $0.2/$1.5. For a typical workload of 10M input and 1.5M output tokens per month, that's $9.30 versus $4.25.
- Which model is better for coding, GLM-4.6 or Grok Code Fast 1?
- On SWE-bench Verified — the standard agentic-coding benchmark — Grok Code Fast 1 scores 70.8% versus 68% for GLM-4.6, making Grok Code Fast 1 the stronger pick for coding agents.