Phi 4 vs Mistral Medium 3.5

Compare Phi 4 from Microsoft and Mistral Medium 3.5 from Mistral AI on key metrics including benchmarks, price, context length, and other model features. Access both models and hundreds of others through the OpenRouter API.

Phi 4 vs Mistral Medium 3.5: side-by-side summary

Phi 4 and Mistral Medium 3.5 are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

Phi 4, from Microsoft, has a 16,384-token context window and is priced at $0.07/M tokens input, $0.14/M tokens output on OpenRouter.

Mistral Medium 3.5, from Mistral AI, has a 262,144-token context window and is priced at $1.50/M tokens input, $7.50/M tokens output on OpenRouter.

Context window

Phi 4: 16,384 tokens
Mistral Medium 3.5: 262,144 tokens

Price

Phi 4: $0.07/M tokens input, $0.14/M tokens output
Mistral Medium 3.5: $1.50/M tokens input, $7.50/M tokens output

Provided by

Phi 4: Microsoft
Mistral Medium 3.5: Mistral AI

Phi 4 vs Mistral Medium 3.5 at a glance

Phi 4 vs Mistral Medium 3.5 comparison
Attribute	Phi 4	Mistral Medium 3.5
Input price	$0.07/M tokens	$1.50/M tokens
Output price	$0.14/M tokens	$7.50/M tokens
Context window	16,384 tokens	262,144 tokens
Intelligence Index	5.9	14.2
Coding Index	Not available	46.9
Agentic Index	Not available	7.0
Latency (p50)	Not available	0.45 s
Throughput (p50)	Not available	151.0 tok/s

Benchmark data updated Oct 5, 2026

Frequently asked questions

Is Phi 4 cheaper than Mistral Medium 3.5?

Phi 4 is cheaper than Mistral Medium 3.5 on OpenRouter: Phi 4 costs $0.07/M tokens input and $0.14/M tokens output, while Mistral Medium 3.5 costs $1.50/M tokens input and $7.50/M tokens output.

Which has the longer context window, Phi 4 or Mistral Medium 3.5?

Mistral Medium 3.5 has the longer context window at 262,144 tokens, compared with 16,384 tokens for Phi 4.

Phi 4 vs Mistral Medium 3.5

Phi 4 vs Mistral Medium 3.5

Overview