Mistral Small 4 vs GLM 5.1

Compare Mistral Small 4 from Mistral AI and GLM 5.1 from Z.ai on key metrics including benchmarks, price, context length, and other model features. Access both models and hundreds of others through the OpenRouter API.

Mistral Small 4 vs GLM 5.1: side-by-side summary

Mistral Small 4 and GLM 5.1 are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

Mistral Small 4, from Mistral AI, has a 262,144-token context window and is priced at $0.15/M tokens input, $0.60/M tokens output on OpenRouter.

GLM 5.1, from Z.ai, has a 204,800-token context window and is priced at $0.966/M tokens input, $3.036/M tokens output on OpenRouter.

Context window

Mistral Small 4: 262,144 tokens
GLM 5.1: 204,800 tokens

Price

Mistral Small 4: $0.15/M tokens input, $0.60/M tokens output
GLM 5.1: $0.966/M tokens input, $3.036/M tokens output

Provided by

Mistral Small 4: Mistral AI
GLM 5.1: Z.ai

Mistral Small 4 vs GLM 5.1 at a glance

Mistral Small 4 vs GLM 5.1 comparison
Attribute	Mistral Small 4	GLM 5.1
Input price	$0.15/M tokens	$0.966/M tokens
Output price	$0.60/M tokens	$3.036/M tokens
Context window	262,144 tokens	204,800 tokens
Intelligence Index	9.0	24.2
Coding Index	Not available	Not available
Agentic Index	Not available	Not available
Latency (p50)	0.74 s	2.01 s
Throughput (p50)	101.0 tok/s	24.0 tok/s

Benchmark data updated Oct 5, 2026

Frequently asked questions

Is Mistral Small 4 cheaper than GLM 5.1?

Mistral Small 4 is cheaper than GLM 5.1 on OpenRouter: Mistral Small 4 costs $0.15/M tokens input and $0.60/M tokens output, while GLM 5.1 costs $0.966/M tokens input and $3.036/M tokens output.

Which has the longer context window, Mistral Small 4 or GLM 5.1?

Mistral Small 4 has the longer context window at 262,144 tokens, compared with 204,800 tokens for GLM 5.1.

Which is faster, Mistral Small 4 or GLM 5.1?

Mistral Small 4 is faster on OpenRouter, generating a median 101.0 tokens per second compared with 24.0 tokens per second for GLM 5.1.

Mistral Small 4 vs GLM 5.1

Mistral Small 4 vs GLM 5.1

Overview