Model comparison - Similar price, same tier

Gemini 3.8 Flash vs Mistral Medium 3.5

Gemini 3.8 Flash is from Google and Mistral Medium 3.5 is from Mistral AI. On list price, Mistral Medium 3.5 charges 2x Gemini 3.8 Flash's input price ($1.50 vs $0.75 per 1M tokens), and Mistral Medium 3.5 charges 2x Gemini 3.8 Flash's output price ($7.50 vs $3.75 per 1M tokens). Gemini 3.8 Flash has a 1,048,576-token context window and Mistral Medium 3.5 256,000 tokens; Gemini 3.8 Flash returns up to 65,536 output tokens per response, and no primary source states a max output for Mistral Medium 3.5. Gemini 3.8 Flash was released on September 2, 2026 and Mistral Medium 3.5 on April 27, 2026. Mistral Medium 3.5 publishes open weights (Modified MIT (https://huggingface.co/mistralai/Mistral-Medium-3.5-128B/blob/main/LICENSE)); Gemini 3.8 Flash is closed-weights.

Last verified October 17, 2026 from each provider's pricing page. All sources

Google - Closed

Gemini 3.8 Flash

Input / 1M: $0.75
Output / 1M: $3.75
Context: 1.05M

Mistral AI - Open

Mistral Medium 3.5

Input / 1M: $1.50
Output / 1M: $7.50
Context: 256K

Side-by-side specs

Spec	Gemini 3.8 Flash	Mistral Medium 3.5
Provider	Google	Mistral AI
Input / 1M tokens	$0.75	$1.50
Output / 1M tokens	$3.75	$7.50
Cache read / 1M	$0.075	$0.15
Batch input / 1M	$0.375	$0.75
Batch output / 1M	$1.875	$3.75
Context window	1,048,576	256,000
Max output	65,536	-
Release date	September 2, 2026	April 27, 2026
Weights	Closed	Open
License	-	Modified MIT (https://huggingface.co/mistralai/Mistral-Medium-3.5-128B/blob/main/LICENSE)
API model id	`gemini-3.8-flash`	`mistral-medium-3-5`
AI Gateway id	`google/gemini-3.8-flash`	`mistral/mistral-medium-3.5`
Last verified	October 17, 2026	October 17, 2026

Prices in USD per 1M tokens at each provider's standard first-party rate. A dash means the provider does not bill that item separately or no primary page states it.

What each costs in practice

The same three workloads every model page uses, worked from each model's standard list rates. Swap in your own token counts with the math on each model's page.

Workload	Gemini 3.8 Flash	Mistral Medium 3.5
One agent session1M input tokens and 100K output tokens, no caching.	$1.13	$2.25
A chat app10,000 requests a day at 2K input and 500 output tokens each.	$33.75$1,012.50 per 30-day month	$67.50$2,025.00 per 30-day month
The same session at a 90% cache hit90% of the input is read from the prompt cache. The one-time cache write premium is not included.	$0.5175	$1.04

Show the math

Gemini 3.8 Flash

One agent sessionInput: 1M x $0.75 = $0.75Output: 0.1M x $3.75 = $0.375
A chat appInput: 20M x $0.75 = $15.00Output: 5M x $3.75 = $18.75
The same session at a 90% cache hitCached input: 0.9M x $0.075 = $0.0675Uncached input: 0.1M x $0.75 = $0.075Output: 0.1M x $3.75 = $0.375

Mistral Medium 3.5

One agent sessionInput: 1M x $1.50 = $1.50Output: 0.1M x $7.50 = $0.75
A chat appInput: 20M x $1.50 = $30.00Output: 5M x $7.50 = $37.50
The same session at a 90% cache hitCached input: 0.9M x $0.15 = $0.135Uncached input: 0.1M x $1.50 = $0.15Output: 0.1M x $7.50 = $0.75

Benchmarks under the same setting

No board in the benchmark directory lists both Gemini 3.8 Flash and Mistral Medium 3.5 under the same setting, so there is no like-for-like score to show here.

Set them up in your tools

Step-by-step guides whose official docs list Gemini 3.8 Flash or Mistral Medium 3.5 by model id.

Model pages

GoogleGemini 3.8 Flash pricing and specsFull rate card, worked cost examples and sources. Closed weights.Mistral AIMistral Medium 3.5 pricing and specsFull rate card, worked cost examples and sources. Open weights.

FAQ

How do Gemini 3.8 Flash and Mistral Medium 3.5 compare on price?

On list price, Mistral Medium 3.5 charges 2x Gemini 3.8 Flash's input price ($1.50 vs $0.75 per 1M tokens), and Mistral Medium 3.5 charges 2x Gemini 3.8 Flash's output price ($7.50 vs $3.75 per 1M tokens). For one agent session of 1M input and 100K output tokens with no caching, that is $1.13 on Gemini 3.8 Flash and $2.25 on Mistral Medium 3.5. Prices are each provider's first-party list rates, verified October 17, 2026 and October 17, 2026.

What are the context windows of Gemini 3.8 Flash and Mistral Medium 3.5?

Gemini 3.8 Flash has a 1,048,576-token context window and Mistral Medium 3.5 256,000 tokens; Gemini 3.8 Flash returns up to 65,536 output tokens per response, and no primary source states a max output for Mistral Medium 3.5.

Are Gemini 3.8 Flash and Mistral Medium 3.5 open weights?

Gemini 3.8 Flash is closed-weights and is called through Google's API as gemini-3.8-flash. Mistral Medium 3.5's weights are published at huggingface.co under the Modified MIT (https://huggingface.co/mistralai/Mistral-Medium-3.5-128B/blob/main/LICENSE).

More comparisons

Sources

Gemini 3.8 Flash verified October 17, 2026 from ai.google.dev; Mistral Medium 3.5 verified October 17, 2026 from docs.mistral.ai. This page is as current as the older of the two: October 17, 2026.

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