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Head-to-head comparison

Claude Haiku 4.5 vs Mistral Medium 3.5

Claude Haiku 4.5 (Anthropic) and Mistral Medium 3.5 (Mistral AI) compared on the ModelCap Index, API price, context window, provider availability, weight access and every public benchmark board they share. Figures are the same ones shown on the live rankings; nothing here is a hidden score.

Snapshot as of 9 September 2026

As of 9 September 2026, Mistral Medium 3.5 holds the stronger ModelCap Index position (#56 vs #58); Claude Haiku 4.5 is 1.5× cheaper per output token ($5.00/1M vs $7.50/1M); and Mistral Medium 3.5 offers the longer context window (262K vs 200K tokens).

Which should you choose?

Choose Claude Haiku 4.5 if…

  • API cost matters — $5.00/1M output tokens against $7.50/1M, about 1.5× cheaper.
  • your workload is prompt-heavy — input tokens cost $1.00/1M against $1.50/1M.
  • you want provider choice — 4 listed API providers against 1.
  • Arena coding is your yardstick — 1481 against 1479.

Choose Mistral Medium 3.5 if…

  • you want the stronger overall ModelCap Index position — #56 against #58 (56.0 vs 55.1 points).
  • you need the longer context window — 262K tokens against 200K.
  • you want the more recently listed model — Mistral Medium 3.5 was listed 30 April 2026, Claude Haiku 4.5 15 October 2025.

Claude Haiku 4.5 vs Mistral Medium 3.5: specs, pricing and context

Specification comparison of Claude Haiku 4.5 and Mistral Medium 3.5
FieldClaude Haiku 4.5AnthropicMistral Medium 3.5Mistral AI
ModelCap Index position#58#56
Index score55.156.0
EvidenceMeasuredMeasured
Input price / 1M tokens$1.00$1.50
Output price / 1M tokens$5.00$7.50
Context window200K tokens262K tokens
Max output tokens64K210K
API providers listed41
Weight accessAPI onlyAPI only
Input modalitiesText, Image, FileText, Image, File
First listed15 October 202530 April 2026
PublisherAnthropicMistral AI

Evidence: 3 public benchmark observations across 3 boards · 4 public benchmark observations across 4 boards. Prices are the lowest listed API offer per million tokens observed on the OpenRouter catalogue.

Benchmark scores: Claude Haiku 4.5 vs Mistral Medium 3.5

Public benchmark boards where Claude Haiku 4.5 or Mistral Medium 3.5 has a published result
BoardClaude Haiku 4.5Mistral Medium 3.5Leads
Arena codingArena (LMArena)14811476–148514791468–1490Claude Haiku 4.5
LMArena AgentLMArena—-9.3%-10.9%–-7.8%Only one result
ARC-AGI-2ARC Prize Foundation4.0%Thinking—Only one result
SWE-benchSWE-bench (Princeton / SWE-agent team)66.6%High—Only one result
BFCL V4UC Berkeley (Gorilla)68.7Function calling—Only one result
AA Intelligence IndexArtificial Analysis—14.9intelligence-index:v4.3:reasoning-unspecifiedOnly one result
AA Terminal-Bench 2.1Artificial Analysis—50.6%terminal-bench:2.1:terminus-2:e2b:pass-at-1:3-repeats:source-model="Mistral Medium 3.5":reasoning=trueOnly one result
AA τ²-Bench TelecomArtificial Analysis—94.2%tau2:telecom:dual-control:pass-at-1:3-repeats:source-model="Mistral Medium 3.5":reasoning=trueOnly one result
AA Humanity's Last ExamArtificial Analysis—13.8%hle:may-2025:text-only-2158:no-tools:pass-at-1:source-model="Mistral Medium 3.5":reasoning=trueOnly one result

Scores are the sources' own published figures for each model's best evaluated configuration; ModelCap never re-runs a benchmark.

Want a different pairing? Open the interactive comparison tool to swap either model for any current ranked language model.

Claude Haiku 4.5 vs Mistral Medium 3.5: common questions

Is Claude Haiku 4.5 better than Mistral Medium 3.5?

Mistral Medium 3.5 ranks higher on the ModelCap Index as of 9 September 2026: #56 against #58. That is a capability ranking built from public benchmark evidence with published uncertainty; whether it is "better" for you also depends on price, context and where you can run it. Their published uncertainty intervals overlap, so the rank difference alone does not establish a reliable capability advantage for your workload.

Is Claude Haiku 4.5 cheaper than Mistral Medium 3.5?

Claude Haiku 4.5 is cheaper on output tokens: $5.00/1M against $7.50/1M. Input tokens are $1.00/1M for Claude Haiku 4.5 and $1.50/1M for Mistral Medium 3.5. Prices are the lowest listed API offer ModelCap observed, in USD per million tokens. For 1,000 requests with 2,000 input and 500 output tokens each (2M input + 0.5M output), the listed-rate estimate is $4.50 for Claude Haiku 4.5 versus $6.75 for Mistral Medium 3.5. Claude Haiku 4.5 costs 33.3% less in this scenario. This excludes caching, batch discounts, prompt-length tiers, tool charges and retries; verify the selected endpoint before budgeting.

Which has the bigger context window, Claude Haiku 4.5 or Mistral Medium 3.5?

Mistral Medium 3.5 has the larger context window: 262K tokens against 200K.

Which is better for coding, Claude Haiku 4.5 or Mistral Medium 3.5?

Arena coding: Claude Haiku 4.5 1481, Mistral Medium 3.5 1479 — Claude Haiku 4.5 leads.

Are Claude Haiku 4.5 and Mistral Medium 3.5 open-weight models?

Claude Haiku 4.5: API only. Mistral Medium 3.5: API only. Open weights mean the checkpoint can be downloaded and self-hosted under its licence; API-only models are available solely through hosted endpoints.

Where can I run Claude Haiku 4.5 and Mistral Medium 3.5?

ModelCap currently lists 4 API providers for Claude Haiku 4.5 and 1 for Mistral Medium 3.5, from the OpenRouter catalogue snapshot the site serves; each model page lists the providers and their prices.

How current is this Claude Haiku 4.5 vs Mistral Medium 3.5 comparison?

Every figure comes from the sealed ModelCap dataset published 9 September 2026; the page re-renders within a minute of each data refresh, and the ModelCap Index positions are the same ones shown on the live rankings.

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