Migrating from magistral-small-2509 to mistral-small-2603

What changes when you move from magistral-small-2509 to mistral-small-2603: input price −70%, output price −60%, context window 128,000 → 256,000 tokens.

From: magistral-small-2509
Status: Retired
Shutdown: Jul 31, 2026
Time left: —

To: mistral-small-2603
Status: Active
Shutdown: none announced
Time left: —

Prices

USD per 1M tokens, standard tier

Type	magistral-small-2509	mistral-small-2603	Change
Input	$0.50first seen October 5, 2026 · source	$0.15first seen October 5, 2026 · source	−70%
Output	$1.50first seen October 5, 2026 · source	$0.60first seen October 5, 2026 · source	−60%

At 1M input and 250K output tokens a month: $0.875 on magistral-small-2509, $0.30 on mistral-small-2603 (−65.7%).

Other tiers, prompt-size bands and modalities are on each model's page.

Limits

Tokens

Limit	magistral-small-2509	mistral-small-2603	Change
Context window	128,000 tokensin place when tracking began (October 6, 2026) · source	256,000 tokensin place when tracking began (October 6, 2026) · source	+100%
Max output tokens	Not published	Not published	—

Features and parameters

Compare models

Same on both

Function calling: supported on both.magistral-small-2509: in place when tracking began (October 6, 2026) · source · mistral-small-2603: in place when tracking began (October 6, 2026) · source
Batch API: supported on both.magistral-small-2509: in place when tracking began (October 6, 2026) · source · mistral-small-2603: in place when tracking began (October 6, 2026) · source
Image input: supported on both.magistral-small-2509: in place when tracking began (October 6, 2026) · source · mistral-small-2603: in place when tracking began (October 6, 2026) · source
PDF input: supported on both.magistral-small-2509: in place when tracking began (October 6, 2026) · source · mistral-small-2603: in place when tracking began (October 6, 2026) · source
Reasoning / thinking: supported on both.magistral-small-2509: in place when tracking began (October 6, 2026) · source · mistral-small-2603: first seen October 7, 2026 · source

Not published for magistral-small-2509: Structured outputs, Prompt caching, Fine-tuning, Built-in web search, temperature parameter, top_p parameter, logprobs, Max output tokens.

Not published for mistral-small-2603: Prompt caching, Fine-tuning, Built-in web search, temperature parameter, top_p parameter, logprobs, Max output tokens.

Aliases

All aliases

Aliases pointing at magistral-small-2509: magistral-small-latest (in place when tracking began (October 6, 2026) · source)

Aliases pointing at mistral-small-2603: mistral-small-latest (in place when tracking began (October 6, 2026) · source)

On cloud platforms

All platform dates

Model	Platform	Platform ID	Shutdown	Time left
magistral-small-2509	Amazon Bedrock	mistral.magistral-small-2509	none announcedActive

Read daily from each platform's own pages. The status above uses each company's own date. Time left counts to 00:00 UTC on the shutdown date, which is the evening before in ET.

Checklist

Change the model string from magistral-small-2509 to mistral-small-2603.

Compared from AIWire's published data when this page loaded. Each fact links to the page it came from. Model pages: magistral-small-2509, mistral-small-2603.