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Anthropic: Claude Haiku 5.5 (batch) vs Mistral: Mistral Medium 3.1 (batch)

Neither wins outright: Anthropic: Claude Haiku 5.5 (batch) is the pick when cost matters at scale, Mistral: Mistral Medium 3.1 (batch) when you need seed (reproducible sampling).

Key numbers

SpecAnthropic: Claude Haiku 5.5 (batch)Mistral: Mistral Medium 3.1 (batch)
ProviderAnthropicMistral AI
Input price (per 1M tokens)$0.05$0.20
Output price (per 1M tokens)$0.25$1.00
Blended price (3:1 input/output)$0.10$0.40
Cheaper than … of all models we track80%58%
Context window1M tokens (~1,500 pages)131K tokens (~197 pages)
Larger context than … of all models69%23%
Max output per response128K tokens (~96,000 words)105K tokens (~78,600 words)
Input typestext, image, filetext, image, file
Output typestexttext
Free variantNoNo
Listed since2026-10-072025-08-13
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What it costs for real workloads

Monthly cost at list price for five common workloads. Token counts per unit are stated so you can scale them to your own traffic. A workload that does not fit a model's context window is marked rather than priced.

Workload (per month)Anthropic: Claude Haiku 5.5 (batch)Mistral: Mistral Medium 3.1 (batch)Difference
Customer-support chatbot
50,000 conversations — each a 6-turn conversation (1,500 in / 400 out tokens)
$8.75$35.00Anthropic: Claude Haiku 5.5 (batch) saves $26.25
RAG search over documents
20,000 questions — each a question answered from ~8 retrieved passages (6,000 in / 500 out tokens)
$8.50$34.00Anthropic: Claude Haiku 5.5 (batch) saves $25.50
Coding / tool-using agent
2,000 tasks — each a multi-step task with tool calls and file context (60,000 in / 6,000 out tokens)
$9.00$36.00Anthropic: Claude Haiku 5.5 (batch) saves $27.00
Batch summarisation
10,000 documents — each a 6,000-word report summarised to a page (8,000 in / 600 out tokens)
$5.50$22.00Anthropic: Claude Haiku 5.5 (batch) saves $16.50
Long-document analysis
500 documents — each a 150-page contract or codebase read in one pass (100,000 in / 2,000 out tokens)
$2.75$11.00Anthropic: Claude Haiku 5.5 (batch) saves $8.25

Capabilities side by side

CapabilityAnthropic: Claude Haiku 5.5 (batch)Mistral: Mistral Medium 3.1 (batch)What it lets you do
Tool / function calling✓ Yes✓ Yescall your APIs and run agent loops
Structured output (JSON schema)✓ Yes✓ Yesreturn JSON that validates against your schema
Reasoning / thinking mode✓ Yes—spend extra tokens thinking before answering hard problems
Image input✓ Yes✓ Yesread screenshots, charts and scanned pages
Audio input——take speech or audio directly
File / PDF input✓ Yes✓ Yesaccept documents without your own parsing step
Image output——generate images, not just text
Built-in web search✓ Yes—answer from live web results
Seed (reproducible sampling)—✓ Yesrepeat a generation for tests and evals
Log-probabilities——read token confidence for classification and scoring

From each model's published parameters and input/output types. “—” means not advertised, not proven absent.

Price history

DateModelInput / 1MOutput / 1M
2026-09-10Mistral: Mistral Medium 3.1 (batch)$0.20$1.00

Which should you choose?

Choose Anthropic: Claude Haiku 5.5 (batch) if…

  • cost matters at scale — it is 75% cheaper on a typical 3:1 input/output mix ($8.75 vs $35.00 a month for 50,000 support chats)
  • you need to fit long inputs in one request — 1M tokens is roughly 1,500 pages, against 197
  • you need reasoning / thinking mode — to spend extra tokens thinking before answering hard problems; Mistral: Mistral Medium 3.1 (batch) does not advertise it
  • you need built-in web search — to answer from live web results; Mistral: Mistral Medium 3.1 (batch) does not advertise it
  • you want the newer model — released 2026-10-07, 14 months after the other

Choose Mistral: Mistral Medium 3.1 (batch) if…

  • you need seed (reproducible sampling) — to repeat a generation for tests and evals; Anthropic: Claude Haiku 5.5 (batch) does not advertise it

Frequently asked questions

Is Anthropic: Claude Haiku 5.5 (batch) better than Mistral: Mistral Medium 3.1 (batch)?

Neither wins outright: Anthropic: Claude Haiku 5.5 (batch) is the pick when cost matters at scale, Mistral: Mistral Medium 3.1 (batch) when you need seed (reproducible sampling). In short: Anthropic: Claude Haiku 5.5 (batch) when cost matters at scale, you need to fit long inputs in one request, you need reasoning / thinking mode, you need built-in web search, you want the newer model; Mistral: Mistral Medium 3.1 (batch) when you need seed (reproducible sampling).

Which is cheaper, Anthropic: Claude Haiku 5.5 (batch) or Mistral: Mistral Medium 3.1 (batch)?

Anthropic: Claude Haiku 5.5 (batch) is cheaper: $0.10 vs $0.40 per 1M tokens at a typical 3:1 input/output mix, 75% less. For 50,000 support conversations a month that is $8.75 against $35.00.

How much do Anthropic: Claude Haiku 5.5 (batch) and Mistral: Mistral Medium 3.1 (batch) cost per million tokens?

Anthropic: Claude Haiku 5.5 (batch) costs $0.05 per 1M input tokens and $0.25 per 1M output tokens; Mistral: Mistral Medium 3.1 (batch) costs $0.20 input and $1.00 output. Output tokens are billed separately, so long answers shift the gap.

Which has the bigger context window, Anthropic: Claude Haiku 5.5 (batch) or Mistral: Mistral Medium 3.1 (batch)?

Anthropic: Claude Haiku 5.5 (batch): 1M tokens, about 1,500 pages, against 131K (about 197 pages) for Mistral: Mistral Medium 3.1 (batch).

Do Anthropic: Claude Haiku 5.5 (batch) and Mistral: Mistral Medium 3.1 (batch) support function calling and JSON output?

Tool calling — Anthropic: Claude Haiku 5.5 (batch): yes, Mistral: Mistral Medium 3.1 (batch): yes. JSON-schema structured output — Anthropic: Claude Haiku 5.5 (batch): yes, Mistral: Mistral Medium 3.1 (batch): yes.

Can Anthropic: Claude Haiku 5.5 (batch) or Mistral: Mistral Medium 3.1 (batch) read images?

Yes, both accept image input.

Is Anthropic: Claude Haiku 5.5 (batch) or Mistral: Mistral Medium 3.1 (batch) free to use?

No free variant is listed for either; both are pay-per-token.

What is the maximum output length of Anthropic: Claude Haiku 5.5 (batch) and Mistral: Mistral Medium 3.1 (batch)?

Anthropic: Claude Haiku 5.5 (batch) can write up to 128K tokens (about 96,000 words) per response; Mistral: Mistral Medium 3.1 (batch) up to 105K (about 78,600 words).

When were Anthropic: Claude Haiku 5.5 (batch) and Mistral: Mistral Medium 3.1 (batch) released?

Anthropic: Claude Haiku 5.5 (batch) was listed on 2026-10-07; Mistral: Mistral Medium 3.1 (batch) on 2025-08-13.

Has the price of Anthropic: Claude Haiku 5.5 (batch) or Mistral: Mistral Medium 3.1 (batch) changed?

Anthropic: Claude Haiku 5.5 (batch): price unchanged since we started tracking it on 2026-10-08. Mistral: Mistral Medium 3.1 (batch): input price cut 50% ($0.40 → $0.20/1M), output price cut 50% ($2.00 → $1.00/1M) on 2026-09-10.

About the two models

Compare Anthropic: Claude Haiku 5.5 (batch) with other models

vs AI21: Jamba Large 1.7vs AionLabs: Aion 3.5vs AionLabs: Aion 3.5 Minivs AionLabs: Aion-1.0

Compare Mistral: Mistral Medium 3.1 (batch) with other models

vs AI21: Jamba Large 1.7vs AionLabs: Aion 3.5vs AionLabs: Aion 3.5 Minivs AionLabs: Aion-1.0
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