Claude Sonnet 4.5 vs Mistral Large 3
Benchmark Performance
Available Benchmarks
| Benchmark | Claude Sonnet 4.5 | Mistral Large 3 |
|---|---|---|
| LMArena Text Arenatext-2026-09-01-011508720696 · arena_rating · leader | 1,433.95100% of row best · rating · claude-sonnet-4-5-20250929-high-32k; 95% CI [1431.13754052, 1436.75329939]; votes 81031; rank 79 | 1,427.62100% of row best · rating · mistral-large-3; 95% CI [1424.57601414, 1430.66670291]; votes 65336; rank 85 |
| ToneBench2026-08-28-10-task-cd9819ab6e4d · overall_score · leader | 77.25100% of row best · points · Claude Sonnet 4.5 · 2,441 output tokens / case | 70.3991% of row best · points · Mistral Large 3 · 2,056 output tokens / case |
| Overall ResultCounted from the protocol-matched rows above | 2 benchmark winsOverall lead | 0 benchmark wins |
Third-party benchmark Only like-for-like primary-publisher results are shown; raw scores, relative scores, configuration, and token spend remain visible.
Technical Differences
Side-by-Side Facts
| Field | Claude Sonnet 4.5 | Mistral Large 3 |
|---|---|---|
| Developer | Anthropic | Mistral AI |
| Family | Claude 4 | Mistral Large 3 |
| Model | Claude Sonnet 4.5 | Mistral Large 3 |
| Version | Claude Sonnet 4.5 | Mistral Large 3 |
| Lifecycle | active | active |
| Released | 2025-09-29 | 2025-12-02 |
| Knowledge cutoff | 2025-01-01 | Unknown |
| Input modalities | Text, Image | Text, Image, Document |
| Output modalities | Text | Text |
| Context window | 200K | 262K |
| Total parameters | Unknown | 675B |
| Active parameters | Unknown | 41B |
| License | Unknown | Apache-2.0 |
| Open weights | No | Yes |
| API available | Yes | Yes |
| Self-hostable | No | Yes |
| Provider access | Anthropic (Standard) | Mistral AI (Standard), Openrouter (Standard) |
| Capabilities | chat, generation, reasoning, structured_outputs, tools | agents, chat, generation, structured_outputs, tools, vision |
14 comparable fields · 11 material differences · Pair passes the primary-source comparison gate
Claude Sonnet 4.5 Capabilities
Mistral Large 3 Capabilities
Internal Comparison Graph
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|---|---|---|---|
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Claude Sonnet 4.5Anthropic | vs | cross-developer peersimage, text |
Primary Evidence
Sources and Freshness
Questions
Claude Sonnet 4.5 vs Mistral Large 3 FAQs
Is Claude Sonnet 4.5 or Mistral Large 3 better for coding?+
This comparison does not currently contain a protocol-matched coding benchmark for both Claude Sonnet 4.5 and Mistral Large 3, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.
Which is cheaper, Claude Sonnet 4.5 or Mistral Large 3?+
Claude Sonnet 4.5 is $3.00 and Mistral Large 3 is $0.50 per million tokens, so Mistral Large 3 is cheaper on this metric. Claude Sonnet 4.5 is $15.00 and Mistral Large 3 is $1.50 per million tokens, so Mistral Large 3 is cheaper on this metric.
Which has a larger context window, Claude Sonnet 4.5 or Mistral Large 3?+
Mistral Large 3 has the larger sourced context window. Claude Sonnet 4.5 supports 200K and Mistral Large 3 supports 262K.
Which performs better in benchmarks, Claude Sonnet 4.5 or Mistral Large 3?+
Claude Sonnet 4.5 leads the current overall benchmark count. The result uses 2 protocol-matched benchmarks from 2 publishers; it is not a universal quality score.
Can Claude Sonnet 4.5 or Mistral Large 3 be self-hosted?+
Mistral Large 3 is the only model in this pair currently marked as self-hostable. Claude Sonnet 4.5 is not marked open weight; Mistral Large 3 is open weight.
Can Claude Sonnet 4.5 and Mistral Large 3 understand images?+
Claude Sonnet 4.5 is documented with image input; Mistral Large 3 is documented with image input. This reflects supported input modalities, not vision quality.
Which can generate longer answers, Claude Sonnet 4.5 or Mistral Large 3?+
Neither has a larger sourced maximum output. Claude Sonnet 4.5 is 64K and Mistral Large 3 is —.
Do Claude Sonnet 4.5 and Mistral Large 3 support reasoning and tool use?+
Claude Sonnet 4.5: reasoning, tool calling, and image input. Mistral Large 3: tool calling and image input. Feature support does not establish relative quality.
Which is available from more inference providers, Claude Sonnet 4.5 or Mistral Large 3?+
Claude Sonnet 4.5 has 1 sourced provider route; Mistral Large 3 has 2, so Mistral Large 3 has broader tracked availability.
Which offers better value, Claude Sonnet 4.5 or Mistral Large 3?+
There is no universal value winner. Compare the input and output prices above with the matched benchmark result for your workload: cheaper tokens can be offset by different quality, token usage, latency, or provider availability.