Mistral Large 4 vs Claude Sonnet 5.5
There is no quality verdict yet: the AIGROW small-business benchmark has not run either model. On price, Mistral Large 4 costs less: $0.70 in and $2.10 out per million tokens, against $2 in and $10 out for Claude Sonnet 5.5.
Run Claude Sonnet 5.5 up to 60% below list price. $25 a month brings $110 of API credit and cancels any time; $25 once buys $100. US dollars, standard rate, shortest context band. Price only: the benchmark has not run both.
- Mistral Large 4
- $2.94
- Claude Sonnet 5.5
- $10.00
- Mistral Large 4, per M tokens
- $0.70 / $2.10
- Claude Sonnet 5.5, per M tokens
- $2 / $10
3,000 tokens in and 400 out each, at list price.
Mistral's flagship against Anthropic's workhorse, at about a third of the Sonnet input price and a fifth of its output. 1,000 support replies cost $10.00 on Claude Sonnet 5.5 and $2.94 on Mistral Large 4, so Claude Sonnet 5.5 costs 3.4 times as much.
What each one costs
The API price per million tokens and the cheapest app plan with each model, from the makers’ own pages. Each name opens that model’s full price page.
- Mistral Large 4
- On the Mistral API, Mistral Large 4 costs $0.70 per million input tokens and $2.10 per million output tokens. Vibe has a free plan and paid plans from $14.99/mo (Pro); the plan list does not name Mistral Large 4. Plan prices read 22 October 2026.
- Claude Sonnet 5.5
- On the Anthropic API, Claude Sonnet 5.5 costs $2 per million input tokens and $10 per million output tokens. In Claude, it comes with the free plan, and the cheapest paid plan with it is Pro at $20/mo. Plan prices read 22 October 2026. AIGROW API credit runs Claude Sonnet 5.5 at $0.80 / $4.00 per million input / output tokens, up to 60% below list price. See API credit
$25 a month brings $110 of API credit and cancels any time; $25 once buys $100.
Side by side
Each maker’s published rate for its standard tier. Cached input is what a repeated prompt prefix costs once the provider has stored it.
| Fact | Mistral Large 4 | Claude Sonnet 5.5 |
|---|---|---|
| Maker | Mistral | Anthropic |
| Tier | Flagships | Workhorses |
| Input, per M tokens | $0.70 | $2.00 |
| Output, per M tokens | $2.10 | $10.00 |
| Cached input | $0.07 | $0.10 |
| Context window | 1M | 1M |
| Released | 6 Oct 2026 | 28 Sep 2026 |
| Weights | Open weights | Closed weights |
What a job costs on each
1,000 runs of each job at the two list prices. The gap moves from job to job because the models price input, output and cached context differently.
| Job | Mistral Large 4 | Claude Sonnet 5.5 | Cheaper |
|---|---|---|---|
| Support reply3,000 in, 400 out. | $2.94 | $10.00 | Mistral Large 4, 71% less |
| Document summary25,000 in, 1,000 out. | $19.60 | $60.00 | Mistral Large 4, 67% less |
| Agent task80,000 in (70,000 cached), 3,000 out. | $18.20 | $57.00 | Mistral Large 4, 68% less |
The token counts are ours, chosen to look like real work; the prices are the makers’. A model with no published cache price bills the agent task’s repeated context at its full input rate.
The small print
What each base rate leaves out, from the makers’ own pages: surcharges, discounts, promotions and cache pricing.
- Mistral Large 4
- List price lowered from $1.36 / $4.18 (cached $0.14), read on 2026-10-15 with a two-week launch discount running. Open weights under the Mistral Ecosystem Open Weight License (version 26.10). 1.05T total, 52B active parameters. Batch 50% off. Mistral’s pricing page
- Claude Sonnet 5.5
- Cache read is 0.05x input on this model ($0.10). Cache write $2.50 (5 min) or $4 (1 h). Batch API 50% off. US-only inference bills 1.1x. Full context window billed at standard rates. Max output 128K. Anthropic’s pricing page
Other comparisons
Every head to head on the list that involves Mistral Large 4 or Claude Sonnet 5.5.
Run Claude Sonnet 5.5 up to 60% below list price
AIGROW API credit covers Claude Sonnet 5.5 at published rates never above the list prices here, and $25 buys $100 of credit.
Prices checked 12 November 2026