OpenAI GPT OSS Safeguard 120B vs Magistral Small 2506
OpenAI GPT OSS Safeguard 120B (2025) and Magistral Small 2506 (2025) are frontier reasoning models from OpenAI and MistralAI. OpenAI GPT OSS Safeguard 120B ships a not-yet-sourced context window, while Magistral Small 2506 ships a 128k-token context window. This comparison covers specs, pricing, API access, capabilities, benchmarks, input and output token costs, and production fit for coding and agent workloads.
OpenAI GPT OSS Safeguard 120B is safer overall; choose Magistral Small 2506 when reasoning depth matters.
Decision scorecard
Local evidence first| Signal | OpenAI GPT OSS Safeguard 120B | Magistral Small 2506 |
|---|---|---|
| Best for | general production evaluation | reasoning-heavy apps |
| Decision fit | Classification and JSON / Tool use | Long context |
| Context window | — | 128k |
| Cheapest output | $0.60/1M tokens | - |
| Provider routes | 1 tracked | 1 tracked |
| Shared benchmarks | 0 rows | 0 rows |
Decision tradeoffs
- OpenAI GPT OSS Safeguard 120B uniquely exposes Structured outputs in local model data.
- Local decision data tags OpenAI GPT OSS Safeguard 120B for Classification and JSON / Tool use.
- Magistral Small 2506 has the larger context window for long prompts, retrieval packs, or transcript analysis.
- Magistral Small 2506 uniquely exposes Reasoning in local model data.
- Local decision data tags Magistral Small 2506 for Long context.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output route or tier on this page.
OpenAI GPT OSS Safeguard 120B
$270
Cheapest tracked route/tier: AWS Bedrock
Magistral Small 2506
Unavailable
No complete token price in local provider data
Cost delta unavailable until both models have sourced input and output token prices.
Switch friction
- No overlapping tracked provider route is sourced for OpenAI GPT OSS Safeguard 120B and Magistral Small 2506; plan for SDK, billing, or endpoint changes.
- Check replacement coverage for Structured outputs before moving production traffic.
- Magistral Small 2506 adds Reasoning in local capability data.
- No overlapping tracked provider route is sourced for Magistral Small 2506 and OpenAI GPT OSS Safeguard 120B; plan for SDK, billing, or endpoint changes.
- Check replacement coverage for Reasoning before moving production traffic.
- OpenAI GPT OSS Safeguard 120B adds Structured outputs in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2025-09-01 | 2025-06-10 |
| Context window | — | 128k |
| Parameters | 120B | 24B |
| Architecture | - | decoder only |
| License | Proprietary | Proprietary |
| Knowledge cutoff | 2024-06 | 2025-06 |
Pricing and availability
| Pricing attribute | OpenAI GPT OSS Safeguard 120B | Magistral Small 2506 |
|---|---|---|
| Input price | $0.15/1M tokens | - |
| Output price | $0.60/1M tokens | - |
| Providers |
Capabilities
| Capability | OpenAI GPT OSS Safeguard 120B | Magistral Small 2506 |
|---|---|---|
| Vision | No | No |
| Multimodal | No | No |
| Reasoning | No | Yes |
| Function calling | No | No |
| Tool use | No | No |
| Structured outputs | Yes | 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 differs most on reasoning mode: Magistral Small 2506 and structured outputs: OpenAI GPT OSS Safeguard 120B. Both models share the core language-model surface, 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.
Pricing coverage is uneven: OpenAI GPT OSS Safeguard 120B has $0.15/1M input tokens and Magistral Small 2506 has no token price sourced yet. Provider availability is 1 tracked routes versus 1. Treat unknown pricing as an integration gap, then verify the route you will actually call before estimating production spend.
Choose OpenAI GPT OSS Safeguard 120B when provider fit are central to the workload. Choose Magistral Small 2506 when reasoning depth 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. For teams standardizing a stack, that distinction is often the difference between a benchmark win and a reliable deployment.
FAQ
Is OpenAI GPT OSS Safeguard 120B or Magistral Small 2506 open source?
OpenAI GPT OSS Safeguard 120B is listed under Proprietary. Magistral Small 2506 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 reasoning mode, OpenAI GPT OSS Safeguard 120B or Magistral Small 2506?
Magistral Small 2506 has the clearer documented reasoning mode signal in this comparison. If reasoning mode is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Which is better for structured outputs, OpenAI GPT OSS Safeguard 120B or Magistral Small 2506?
OpenAI GPT OSS Safeguard 120B has the clearer documented structured outputs signal in this comparison. If structured outputs is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Where can I run OpenAI GPT OSS Safeguard 120B and Magistral Small 2506?
OpenAI GPT OSS Safeguard 120B is available on AWS Bedrock. Magistral Small 2506 is available on NVIDIA NIM. Provider coverage can affect latency, region availability, compliance posture, and fallback options.
When should I pick OpenAI GPT OSS Safeguard 120B over Magistral Small 2506?
OpenAI GPT OSS Safeguard 120B is safer overall; choose Magistral Small 2506 when reasoning depth matters. If your workload also depends on provider fit, start with OpenAI GPT OSS Safeguard 120B; if it depends on reasoning depth, run the same evaluation with Magistral Small 2506.
Continue comparing
Last reviewed: 2026-05-22. Data sourced from public model cards and provider documentation.