Firefunction V2 vs Mistral Magistral Small 2509
Firefunction V2 (2024) and Mistral Magistral Small 2509 (2025) are compact production models from Fireworks AI and MistralAI. Firefunction V2 ships a 32k-token context window, while Mistral Magistral Small 2509 ships a not-yet-sourced context window. On pricing, Mistral Magistral Small 2509 costs $0.50/1M input tokens versus $0.90/1M for the alternative. This comparison covers specs, pricing, capabilities, benchmarks, provider availability, and production fit.
Mistral Magistral Small 2509 is ~80% cheaper at $0.50/1M; pay for Firefunction V2 only for provider fit.
Decision scorecard
Local evidence first| Signal | Firefunction V2 | Mistral Magistral Small 2509 |
|---|---|---|
| Best for | general production evaluation | provider-routed production |
| Decision fit | General | General |
| Context window | 32k | — |
| Cheapest output | $0.90/1M tokens | $1.50/1M tokens |
| Provider routes | 1 tracked | 2 tracked |
| Shared benchmarks | 0 rows | 0 rows |
Decision tradeoffs
- Firefunction V2 has the larger context window for long prompts, retrieval packs, or transcript analysis.
- Firefunction V2 has the lower cheapest tracked output price at $0.90/1M tokens.
- Mistral Magistral Small 2509 has broader tracked provider coverage for fallback and procurement flexibility.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output route or tier on this page.
Firefunction V2
$945
Cheapest tracked route/tier: Fireworks AI
Mistral Magistral Small 2509
$775
Cheapest tracked route/tier: AWS Bedrock
Estimated monthly gap: $170. Batch, cache, alternate speed tiers, and negotiated pricing are excluded from this local estimate.
Switch friction
- No overlapping tracked provider route is sourced for Firefunction V2 and Mistral Magistral Small 2509; plan for SDK, billing, or endpoint changes.
- Mistral Magistral Small 2509 is $0.60/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
- No overlapping tracked provider route is sourced for Mistral Magistral Small 2509 and Firefunction V2; plan for SDK, billing, or endpoint changes.
- Firefunction V2 is $0.60/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
Specs
| Specification | ||
|---|---|---|
| Released | 2024-01-29 | 2025-09-01 |
| Context window | 32k | — |
| Parameters | 70B | 24B |
| Architecture | decoder only | - |
| License | Unknown | Proprietary |
| Knowledge cutoff | - | - |
Pricing and availability
| Pricing attribute | Firefunction V2 | Mistral Magistral Small 2509 |
|---|---|---|
| Input price | $0.90/1M tokens | $0.50/1M tokens |
| Output price | $0.90/1M tokens | $1.50/1M tokens |
| Providers |
Capabilities
| Capability | Firefunction V2 | Mistral Magistral Small 2509 |
|---|---|---|
| Vision | No | No |
| Multimodal | No | No |
| Reasoning | No | No |
| Function calling | No | No |
| Tool use | No | No |
| Structured outputs | No | No |
| 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 is close: both models cover the core production surface. That makes context budget, benchmark fit, and provider maturity more important than a simple checklist. If your application depends on one integration detail, verify it against the provider route you plan to use, not just the base model listing.
For cost, Firefunction V2 lists $0.90/1M input and $0.90/1M output tokens on the cheapest tracked provider, while Mistral Magistral Small 2509 lists $0.50/1M input and $1.50/1M output tokens on the cheapest tracked provider. A 70/30 input-output blend puts Mistral Magistral Small 2509 lower by about $0.10 per million blended tokens. Availability is 1 providers versus 2, so concentration risk also matters.
Choose Firefunction V2 when provider fit are central to the workload. Choose Mistral Magistral Small 2509 when provider fit, lower input-token cost, 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. It also helps separate model capability from provider packaging, which can change cost and latency.
FAQ
Which is cheaper, Firefunction V2 or Mistral Magistral Small 2509?
Mistral Magistral Small 2509 is cheaper on tracked token pricing. Firefunction V2 costs $0.90/1M input and $0.90/1M output tokens. Mistral Magistral Small 2509 costs $0.50/1M input and $1.50/1M output tokens. Provider discounts or batch pricing can still change the final bill.
Is Firefunction V2 or Mistral Magistral Small 2509 open source?
Firefunction V2 is listed under Unknown. Mistral Magistral Small 2509 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.
Where can I run Firefunction V2 and Mistral Magistral Small 2509?
Firefunction V2 is available on Fireworks AI. Mistral Magistral Small 2509 is available on AWS Bedrock and Vercel AI Gateway. Provider coverage can affect latency, region availability, compliance posture, and fallback options.
When should I pick Firefunction V2 over Mistral Magistral Small 2509?
Mistral Magistral Small 2509 is ~80% cheaper at $0.50/1M; pay for Firefunction V2 only for provider fit. If your workload also depends on provider fit, start with Firefunction V2; if it depends on provider fit, run the same evaluation with Mistral Magistral Small 2509.
Continue comparing
Last reviewed: 2026-05-22. Data sourced from public model cards and provider documentation.