GLM-5.2 (on Mistral) vs GPT-5.6 Sol
Both are Flagship-tier models, from Mistral AI and OpenAI respectively. GLM-5.2 (on Mistral) is the cheaper choice overall at a 4:1 input:output ratio.
Which is cheaper
- Input price: GLM-5.2 (on Mistral) is cheaper ($1.40 vs $4.00).
- Output price: GLM-5.2 (on Mistral) is cheaper ($4.40 vs $20.00).
- Blended, 4:1 input:output ratio: GLM-5.2 (on Mistral) is 72.2% cheaper ($2.00 vs $7.20 per weighted 1M tokens).
Side by side
| Spec | GLM-5.2 (on Mistral) | GPT-5.6 Sol |
|---|---|---|
| Provider | Mistral AI | OpenAI |
| Tier | Flagship | Flagship |
| Context window | 1M | 1.05M |
| Max output | 128K | 128K |
| Input $/1M | $1.40 | $4.00 |
| Output $/1M | $4.40 | $20.00 |
| Cache read $/1M | $0.14 | $0.40 |
| Cache write $/1M | — | $5.00 |
| Modalities | text | text, image |
GLM-5.2 (on Mistral). A Z.ai model resold by Mistral and served on Mistral's EU infrastructure, listed as zai-glm-5-2 on Mistral's own pricing page. Cache read is $0.14 per 1M.
GPT-5.6 Sol. Short-context rate, for prompts up to 272K input tokens. Above 272K the rate is $8 input / $30 output, cache read $0.80, cache write $10 per 1M. Promotional pricing, stated to run at least through 21 November 2026.
Sources
GLM-5.2 (on Mistral) — verified August 29, 2026
GPT-5.6 Sol — verified August 29, 2026
Full GLM-5.2 (on Mistral) pricing page → · Full GPT-5.6 Sol pricing page →