Model comparison
GLM-5.3 vs Mistral Medium 3.1
GLM-5.3 (Z.ai) and Mistral Medium 3.1 (Mistral) side by side: what each costs per million tokens through Rapid Router, how much context each takes, what each supports, and where independent benchmarks place them. Same API, same key; switching is a one-string change.
| GLM-5.3 | Mistral Medium 3.1 | |
|---|---|---|
| Input price per 1M | $0.079 | $0.400 |
| Output price per 1M | $4.80 | $2.00 |
| Context window | 1M tokens | 262K tokens |
| Max output | 131K tokens | 262K tokens |
| Input types | text | text, image |
| Capabilities | tools, JSON, reasoning | tools, vision |
| Author | Z.ai | Mistral |
| LMArena Overall | 1472 | 1424 |
| LMArena Coding | 1495 | 1433 |
| LMArena Math | 1491 | 1409 |
| LMArena Creative writing | 1456 | 1391 |
| LMArena Instruction following | 1476 | 1398 |
| LMArena Hard prompts | 1488 | 1426 |
| LMArena Vision | — | 1172 |
| LMArena Web dev | 1621 | — |
| GPQA Diamond | 90.9% | — |
| OTIS Mock AIME | 91.1% | — |
| SimpleQA Verified | 41.0% | — |
Scores from LMArena and Epoch AI, as published; a blank cell means not measured there.
What a month costs on each
| Workload | GLM-5.3 | Mistral Medium 3.1 |
|---|---|---|
| Chatbot month (15M in, 4M out) | $20.38 | $14.00 |
| RAG month (40M in, 3M out) | $17.56 | $22.00 |
| Coding month (60M in, 10M out) | $52.74 | $44.00 |
On a typical 75/25 input-output mix, Mistral Medium 3.1 costs less (about 36% less than GLM-5.3). GLM-5.3 takes the longer prompt at 1M tokens. Try your own numbers in the cost calculator.
Call either one
curl https://rapidrouter.ai/api/v1/chat/completions \
-H "Authorization: Bearer $RAPIDROUTER_API_KEY" \
-H "Content-Type: application/json" \
-d '{"model": "z-ai/glm-5.3", "messages": [{"role": "user", "content": "Hello"}]}'
# the other one: change the model string
-d '{"model": "mistralai/mistral-medium-2508", ...}'Common questions
Which is cheaper, GLM-5.3 or Mistral Medium 3.1?
Mistral Medium 3.1 is cheaper on a typical mix of 75% input and 25% output tokens, by about 36%. Through Rapid Router both are billed at the provider list price per million tokens.
Which has the larger context window?
GLM-5.3, at 1M tokens. Mistral Medium 3.1 offers 262K tokens.
Can I switch between GLM-5.3 and Mistral Medium 3.1 without changing code?
Yes. Both are callable at https://rapidrouter.ai/api/v1 with the same OpenAI-compatible request; only the model string changes (z-ai/glm-5.3 or mistralai/mistral-medium-2508).
How do I pay for GLM-5.3 or Mistral Medium 3.1?
Top up a Rapid Router balance by card in US dollars, and both models debit that balance per request.
More GLM models: Z.ai API pricing · More Mistral: Mistral API pricing