Choose Anthropic: Claude Opus 4.5 (batch) if…
- you need built-in web search — to answer from live web results; Mistral: Mistral Medium 3.5 (batch) does not advertise it
Anthropic: Claude Opus 4.5 (batch) vs Mistral: Mistral Medium 3.5 (batch)
Neither wins outright: Anthropic: Claude Opus 4.5 (batch) is the pick when you need built-in web search, Mistral: Mistral Medium 3.5 (batch) when cost matters at scale.
Key numbers
| Spec | Anthropic: Claude Opus 4.5 (batch) | Mistral: Mistral Medium 3.5 (batch) |
|---|---|---|
| Provider | Anthropic | Mistral AI |
| Input price (per 1M tokens) | $2.50 | $0.75 |
| Output price (per 1M tokens) | $12.50 | $3.75 |
| Blended price (3:1 input/output) | $5.00 | $1.50 |
| Cheaper than … of all models we track | 10% | 31% |
| Context window | 200K tokens (~300 pages) | 262K tokens (~393 pages) |
| Larger context than … of all models | 38% | 48% |
| Max output per response | 64K tokens (~48,000 words) | 210K tokens (~157,300 words) |
| Input types | file, image, text | text, image, file |
| Output types | text | text |
| Free variant | No | No |
| Listed since | 2025-11-24 | 2026-04-30 |
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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 Opus 4.5 (batch) | Mistral: Mistral Medium 3.5 (batch) | Difference |
|---|---|---|---|
| Customer-support chatbot 50,000 conversations — each a 6-turn conversation (1,500 in / 400 out tokens) | $438 | $131 | Mistral: Mistral Medium 3.5 (batch) saves $306 |
| RAG search over documents 20,000 questions — each a question answered from ~8 retrieved passages (6,000 in / 500 out tokens) | $425 | $127 | Mistral: Mistral Medium 3.5 (batch) saves $298 |
| 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) | $450 | $135 | Mistral: Mistral Medium 3.5 (batch) saves $315 |
| Batch summarisation 10,000 documents — each a 6,000-word report summarised to a page (8,000 in / 600 out tokens) | $275 | $82.50 | Mistral: Mistral Medium 3.5 (batch) saves $193 |
| Long-document analysis 500 documents — each a 150-page contract or codebase read in one pass (100,000 in / 2,000 out tokens) | $138 | $41.25 | Mistral: Mistral Medium 3.5 (batch) saves $96.25 |
Capabilities side by side
| Capability | Anthropic: Claude Opus 4.5 (batch) | Mistral: Mistral Medium 3.5 (batch) | What it lets you do |
|---|---|---|---|
| Tool / function calling | ✓ Yes | ✓ Yes | call your APIs and run agent loops |
| Structured output (JSON schema) | ✓ Yes | ✓ Yes | return JSON that validates against your schema |
| Reasoning / thinking mode | ✓ Yes | ✓ Yes | spend extra tokens thinking before answering hard problems |
| Image input | ✓ Yes | ✓ Yes | read screenshots, charts and scanned pages |
| Audio input | — | — | take speech or audio directly |
| File / PDF input | ✓ Yes | ✓ Yes | accept 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) | — | ✓ Yes | repeat 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
- Anthropic: Claude Opus 4.5 (batch): price unchanged since we started tracking it on 2026-08-07.
- Mistral: Mistral Medium 3.5 (batch): price unchanged since we started tracking it on 2026-08-29.
Which should you choose?
Choose Mistral: Mistral Medium 3.5 (batch) if…
- cost matters at scale — it is 70% cheaper on a typical 3:1 input/output mix ($131 vs $438 a month for 50,000 support chats)
- you need seed (reproducible sampling) — to repeat a generation for tests and evals; Anthropic: Claude Opus 4.5 (batch) does not advertise it
- you generate long outputs in one go — up to 210K tokens (about 157,300 words) per response
- you want the newer model — released 2026-04-30, 5 months after the other
Frequently asked questions
Is Anthropic: Claude Opus 4.5 (batch) better than Mistral: Mistral Medium 3.5 (batch)?
Neither wins outright: Anthropic: Claude Opus 4.5 (batch) is the pick when you need built-in web search, Mistral: Mistral Medium 3.5 (batch) when cost matters at scale. In short: Anthropic: Claude Opus 4.5 (batch) when you need built-in web search; Mistral: Mistral Medium 3.5 (batch) when cost matters at scale, you need seed (reproducible sampling), you generate long outputs in one go, you want the newer model.
Which is cheaper, Anthropic: Claude Opus 4.5 (batch) or Mistral: Mistral Medium 3.5 (batch)?
Mistral: Mistral Medium 3.5 (batch) is cheaper: $1.50 vs $5.00 per 1M tokens at a typical 3:1 input/output mix, 70% less. For 50,000 support conversations a month that is $131 against $438.
How much do Anthropic: Claude Opus 4.5 (batch) and Mistral: Mistral Medium 3.5 (batch) cost per million tokens?
Anthropic: Claude Opus 4.5 (batch) costs $2.50 per 1M input tokens and $12.50 per 1M output tokens; Mistral: Mistral Medium 3.5 (batch) costs $0.75 input and $3.75 output. Output tokens are billed separately, so long answers shift the gap.
Which has the bigger context window, Anthropic: Claude Opus 4.5 (batch) or Mistral: Mistral Medium 3.5 (batch)?
Mistral: Mistral Medium 3.5 (batch): 262K tokens, about 393 pages, against 200K (about 300 pages) for Anthropic: Claude Opus 4.5 (batch).
Do Anthropic: Claude Opus 4.5 (batch) and Mistral: Mistral Medium 3.5 (batch) support function calling and JSON output?
Tool calling — Anthropic: Claude Opus 4.5 (batch): yes, Mistral: Mistral Medium 3.5 (batch): yes. JSON-schema structured output — Anthropic: Claude Opus 4.5 (batch): yes, Mistral: Mistral Medium 3.5 (batch): yes.
Can Anthropic: Claude Opus 4.5 (batch) or Mistral: Mistral Medium 3.5 (batch) read images?
Yes, both accept image input.
Is Anthropic: Claude Opus 4.5 (batch) or Mistral: Mistral Medium 3.5 (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 Opus 4.5 (batch) and Mistral: Mistral Medium 3.5 (batch)?
Anthropic: Claude Opus 4.5 (batch) can write up to 64K tokens (about 48,000 words) per response; Mistral: Mistral Medium 3.5 (batch) up to 210K (about 157,300 words).
When were Anthropic: Claude Opus 4.5 (batch) and Mistral: Mistral Medium 3.5 (batch) released?
Anthropic: Claude Opus 4.5 (batch) was listed on 2025-11-24; Mistral: Mistral Medium 3.5 (batch) on 2026-04-30.
About the two models
Anthropic: Claude Opus 4.5 (batch)
Claude Opus 4.5 is Anthropic’s frontier reasoning model optimized for complex software engineering, agentic workflows, and long-horizon computer use. It offers strong multimodal capabilities, competitive performance across real-world coding and...
Full Anthropic: Claude Opus 4.5 (batch) specs →Mistral: Mistral Medium 3.5 (batch)
Mistral Medium 3.5 is a dense 128B instruction-following model from Mistral AI. It supports text and image inputs with text output, and is designed for agentic workflows, coding, and complex...
Full Mistral: Mistral Medium 3.5 (batch) specs →