Claude Instant 1.2 vs Mistral Medium 3.5
Claude Instant 1.2 (2023) and Mistral Medium 3.5 (2026) are frontier reasoning models from Anthropic and MistralAI. Claude Instant 1.2 ships a 100k-token context window, while Mistral Medium 3.5 ships a 256k-token context window. On pricing, Claude Instant 1.2 costs $0.80/1M input tokens versus $1.50/1M for the alternative. This comparison covers specs, pricing, API access, capabilities, benchmarks, input and output token costs, and production fit for coding and agent workloads.
Claude Instant 1.2 is ~87% cheaper at $0.80/1M; pay for Mistral Medium 3.5 only for reasoning depth.
Decision scorecard
Local evidence first| Signal | Claude Instant 1.2 | Mistral Medium 3.5 |
|---|---|---|
| Best for | provider-routed production | reasoning-heavy apps, multimodal apps, and tool-calling agents |
| Decision fit | Classification and JSON / Tool use | Coding, RAG, and Agents |
| Context window | 100k | 256k |
| Cheapest output | $2.40/1M tokens | $7.50/1M tokens |
| Provider routes | 2 tracked | 3 tracked |
| Shared benchmarks | 0 rows | 0 rows |
Decision tradeoffs
- Claude Instant 1.2 has the lower cheapest tracked output price at $2.40/1M tokens.
- Local decision data tags Claude Instant 1.2 for Classification and JSON / Tool use.
- Mistral Medium 3.5 has the larger context window for long prompts, retrieval packs, or transcript analysis.
- Mistral Medium 3.5 has broader tracked provider coverage for fallback and procurement flexibility.
- Mistral Medium 3.5 uniquely exposes Vision, Multimodal, and Reasoning in local model data.
- Local decision data tags Mistral Medium 3.5 for Coding, RAG, and Agents.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output route or tier on this page.
Claude Instant 1.2
$1,240
Cheapest tracked route/tier: AWS Bedrock
Mistral Medium 3.5
$3,075
Cheapest tracked route/tier: Mistral AI Studio
Estimated monthly gap: $1,835. Batch, cache, alternate speed tiers, and negotiated pricing are excluded from this local estimate.
Switch friction
- No overlapping tracked provider route is sourced for Claude Instant 1.2 and Mistral Medium 3.5; plan for SDK, billing, or endpoint changes.
- Mistral Medium 3.5 is $5.10/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
- Mistral Medium 3.5 adds Vision, Multimodal, and Reasoning in local capability data.
- No overlapping tracked provider route is sourced for Mistral Medium 3.5 and Claude Instant 1.2; plan for SDK, billing, or endpoint changes.
- Claude Instant 1.2 is $5.10/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
- Check replacement coverage for Vision, Multimodal, and Reasoning before moving production traffic.
Specs
| Specification | ||
|---|---|---|
| Released | 2023-08-09 | 2026-04-29 |
| Context window | 100k | 256k |
| Parameters | 20B | 128B |
| Architecture | decoder only | decoder only |
| License | Proprietary | Proprietary |
| Openness | Proprietary | Proprietary |
| Commercial use | Commercial use with conditions | Commercial use with conditions |
| Knowledge cutoff | 2023-01 | - |
Pricing and availability
| Pricing attribute | Claude Instant 1.2 | Mistral Medium 3.5 |
|---|---|---|
| Input price | $0.80/1M tokens | $1.50/1M tokens |
| Output price | $2.40/1M tokens | $7.50/1M tokens |
| Providers |
Capabilities
| Capability | Claude Instant 1.2 | Mistral Medium 3.5 |
|---|---|---|
| Vision | No | Yes |
| Multimodal | No | Yes |
| Reasoning | No | Yes |
| Function calling | No | Yes |
| Tool use | No | Yes |
| Structured outputs | Yes | Yes |
| Code execution | No | No |
| IDE integration | No | No |
| Computer use | No | No |
| Parallel agents | No | No |
Benchmarks
No shared benchmark rows are currently sourced for this pair.
Deep dive
The capability footprint differs most on vision: Mistral Medium 3.5, multimodal input: Mistral Medium 3.5, reasoning mode: Mistral Medium 3.5, function calling: Mistral Medium 3.5, and tool use: Mistral Medium 3.5. Both models share structured outputs, so the practical split is not just feature count. Use those differences to decide whether the page is about raw model quality, agentic coding support, multimodal ingestion, or predictable structured API behavior.
For cost, Claude Instant 1.2 lists $0.80/1M input and $2.40/1M output tokens on the cheapest tracked provider, while Mistral Medium 3.5 lists $1.50/1M input and $7.50/1M output tokens on the cheapest tracked provider. A 70/30 input-output blend puts Claude Instant 1.2 lower by about $2.02 per million blended tokens. Availability is 2 providers versus 3, so concentration risk also matters.
Choose Claude Instant 1.2 when provider fit and lower input-token cost are central to the workload. Choose Mistral Medium 3.5 when reasoning depth, larger context windows, and broader provider choice are more important. For production, rerun your own prompts through the exact provider, region, and tool stack you plan to ship. This keeps the decision grounded in measurable tradeoffs instead of brand-level assumptions.
FAQ
Which has a larger context window, Claude Instant 1.2 or Mistral Medium 3.5?
Mistral Medium 3.5 supports 256k tokens, while Claude Instant 1.2 supports 100k tokens. That gap matters most for long documents, large codebases, retrieval-heavy agents, and conversations where earlier context must remain visible.
Which is cheaper, Claude Instant 1.2 or Mistral Medium 3.5?
Claude Instant 1.2 is cheaper on tracked token pricing. Claude Instant 1.2 costs $0.80/1M input and $2.40/1M output tokens. Mistral Medium 3.5 costs $1.50/1M input and $7.50/1M output tokens. Provider discounts or batch pricing can still change the final bill.
Is Claude Instant 1.2 or Mistral Medium 3.5 open source?
Claude Instant 1.2 is listed under Proprietary. Mistral Medium 3.5 is listed under Proprietary. License labels affect whether you can self-host, redistribute weights, or rely only on hosted APIs, so confirm the upstream license before deployment.
Which is better for vision, Claude Instant 1.2 or Mistral Medium 3.5?
Mistral Medium 3.5 has the clearer documented vision signal in this comparison. If vision is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Which is better for multimodal input, Claude Instant 1.2 or Mistral Medium 3.5?
Mistral Medium 3.5 has the clearer documented multimodal input signal in this comparison. If multimodal input is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Where can I run Claude Instant 1.2 and Mistral Medium 3.5?
Claude Instant 1.2 is available on AWS Bedrock and Anthropic. Mistral Medium 3.5 is available on Mistral AI Studio, OpenRouter, and Vercel AI Gateway. Provider coverage can affect latency, region availability, compliance posture, and fallback options.
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Last reviewed: 2026-05-22. Data sourced from public model cards and provider documentation.