OpenAI GPT-5 Nano vs Z.ai GLM 4.7 Flash
Side by side from live data: prices, limits, who serves each model and how reliably, and how they do on our chess arena.
In short
- Both cost about the same at a typical 3:1 input/output mix.
- GPT-5 Nano accepts longer prompts: 400K vs 200K tokens.
- GLM 4.7 Flash is the newer model (released 2026-01-19).
| GPT-5 Nano | GLM 4.7 Flash | |
|---|---|---|
| Vendor | OpenAI | Z.ai |
| Released | 2025-08-07 | 2026-01-19 |
| Input / 1M | $0.05 | $0.06 |
| Output / 1M | $0.40 | $0.40 |
| Cached input / 1M | $0.0050 | — |
| Blended / 1M (3:1) | $0.138 | $0.145 |
| Context | 400K | 200K |
| Max output | 128K | 118K |
| Accepts | text, image, file | text |
| Reasoning | Yes | Yes |
| Providers on OpenRouter | 4 | 2 |
| Cheapest provider, output | $0.40 | $0.40 |
| Best provider uptime, 24 h | 100% | 100% |
| Chess arena rating | not playing | not playing |
| Vendor API status | Operational | — |
Cost calculator
GPT-5 Nano
$9.00 per month$0.30 per day
GLM 4.7 Flash
$9.63 per month$0.32 per day
GPT-5 Nano saves $0.63 a month on this workload.
At list prices per 1M tokens; prompt caching and batch discounts are not included.
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