Claude Opus 5.5 Paid vs 
Mistral Large 4 Open
Claude Opus 5.5 vs Mistral Large 4 compared — price per token, context window, multimodality, openness and which to choose. Can the open-source model replace the paid one? Full 2026 breakdown.
Claude Opus 5.5 — full profile ›
Prices & specs refreshed from live data · olud.ai
Open-model prices = cheapest provider via OpenRouter; official maker rates may be higher.
$20 /M outputManaged API (no infra to run)
$4.18 /M outputNo per-token fees if you self-host
Claude Opus 5.5 vs Mistral Large 4 specs
| Spec | Claude Opus 5.5 | Mistral Large 4 | Winner |
|---|---|---|---|
| Maker | Anthropic | Mistral AI | – |
| Type | Proprietary | Open-weight | |
| Context window | 1M tokens | 1M tokens | |
| Input price | $4/M | $1.36/M · free self-host | |
| Output price | $20/M | $4.18/M · free self-host | |
| Vision / multimodal | Yes | Yes | = Tie |
| Tool / function calling | Yes | Yes | = Tie |
| Self-hostable | No (API only) | Yes | |
| License | Proprietary | Apache 2.0 |
Price gap & when to choose each
Mistral Large 4 is ~4.8× cheaper than Claude Opus 5.5 on output tokens ($4.18 vs $20 per M tokens).
- You want frontier performance through a managed API
- You value reliability & ecosystem
- You don't want to manage infrastructure
- You want to self-host or run on your cloud
- You need the longer 1M context window
- You prioritize data privacy & control
- You want the lowest operating costs
- You are building open or reproducible AI
Feature comparison
| Capability | Claude Opus 5.5 | Mistral Large 4 |
|---|---|---|
| Open weights (downloadable) | ✗ | ✓ |
| Self-hostable | ✗ | ✓ |
| Runs fully offline | ✗ | ✓ |
| Vision / multimodal | ✓ | ✓ |
| Tool / function calling | ✓ | ✓ |
| 1M+ context window | ✓ | ✓ |
Benchmarks: Claude Opus 5.5 vs Mistral Large 4
Independent benchmark scores measured by Artificial Analysis. Higher is better (except latency).
Benchmark data by Artificial Analysis.
How Claude Opus 5.5 and Mistral Large 4 score
| Criterion | Claude Opus 5.5 | Mistral Large 4 |
|---|---|---|
| Cost-efficiency | 3.0 | 4.0 |
| Context window | 5.0 | 5.0 |
| Openness | 1.5 | 5.0 |
| Self-hosting | 1.0 | 5.0 |
| Multimodality | 5.0 | 5.0 |
Scores come from live data — output price (cost), context length, open vs closed weights (openness & self-hosting) and vision/tool support (multimodality). Raw task quality isn't scored here; it depends on your benchmark — see the verdict.
What each model is
Claude Opus 5.5 Paid
Claude Opus 5.5 is Anthropic's flagship model for demanding reasoning, coding, and long-horizon agentic work, succeeding Claude Opus 5. It is particularly strong at multi-step changes in large codebases, code...
Mistral Large 4 Open
Mistral Large 4 is a frontier multimodal (text and image input) model from Mistral AI built for reasoning, coding, and agentic workloads. It offers a 1M-token context window with up...
Other models in these families
These variants are tracked but not compared here — one page per family keeps the comparison readable.
Frequently asked questions
Is Mistral Large 4 as good as Claude Opus 5.5?
Mistral Large 4 is open-weight and competitive on many tasks, but Claude Opus 5.5 may still lead on the hardest reasoning and agentic work. The gap keeps narrowing — benchmark both on your actual use case before deciding.
Can I run Mistral Large 4 locally?
Yes. Mistral Large 4 has open weights, so you can self-host it on your own GPUs or run it via a low-cost API. Claude Opus 5.5 is API-only and cannot be self-hosted.
How much cheaper is Mistral Large 4?
Mistral Large 4 costs $4.18/M output vs $20/M for Claude Opus 5.5 — roughly 5x cheaper via API, and free if you self-host.
Claude Opus 5.5 vs Mistral Large 4 — which should I pick in 2026?
Choose Mistral Large 4 if you want to self-host, keep your data private and skip per-token fees — it's open-weight and runs on your own hardware. Choose Claude Opus 5.5 if you want frontier capability through a managed API with zero infrastructure to run.
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