Gemini Robotics-ER 1.5 Preview vs Mistral Magistral Small 2509
Gemini Robotics-ER 1.5 Preview (2025) and Mistral Magistral Small 2509 (2025) are compact production models from Google DeepMind and MistralAI. Gemini Robotics-ER 1.5 Preview ships a 32k-token context window, while Mistral Magistral Small 2509 ships a not-yet-sourced context window. This comparison covers specs, pricing, API access, capabilities, benchmarks, input and output token costs, and production fit for coding and agent workloads.
Mistral Magistral Small 2509 is safer overall; choose Gemini Robotics-ER 1.5 Preview when vision-heavy evaluation matters.
Decision scorecard
Local evidence first| Signal | Gemini Robotics-ER 1.5 Preview | Mistral Magistral Small 2509 |
|---|---|---|
| Best for | multimodal apps and tool-calling agents | provider-routed production |
| Decision fit | Agents, Vision, and JSON / Tool use | General |
| Context window | 32k | — |
| Cheapest output | - | $1.50/1M tokens |
| Provider routes | 1 tracked | 2 tracked |
| Shared benchmarks | 0 rows | 0 rows |
Decision tradeoffs
- Gemini Robotics-ER 1.5 Preview has the larger context window for long prompts, retrieval packs, or transcript analysis.
- Gemini Robotics-ER 1.5 Preview uniquely exposes Vision, Multimodal, and Function calling in local model data.
- Local decision data tags Gemini Robotics-ER 1.5 Preview for Agents, Vision, and JSON / Tool use.
- 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.
Gemini Robotics-ER 1.5 Preview
Unavailable
No complete token price in local provider data
Mistral Magistral Small 2509
$775
Cheapest tracked route/tier: AWS Bedrock
Cost delta unavailable until both models have sourced input and output token prices.
Switch friction
- No overlapping tracked provider route is sourced for Gemini Robotics-ER 1.5 Preview and Mistral Magistral Small 2509; plan for SDK, billing, or endpoint changes.
- Check replacement coverage for Vision, Multimodal, and Function calling before moving production traffic.
- No overlapping tracked provider route is sourced for Mistral Magistral Small 2509 and Gemini Robotics-ER 1.5 Preview; plan for SDK, billing, or endpoint changes.
- Gemini Robotics-ER 1.5 Preview adds Vision, Multimodal, and Function calling in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2025-03-12 | 2025-09-01 |
| Context window | 32k | — |
| Parameters | — | 24B |
| Architecture | decoder only | - |
| License | Proprietary | Proprietary |
| Knowledge cutoff | - | - |
Pricing and availability
| Pricing attribute | Gemini Robotics-ER 1.5 Preview | Mistral Magistral Small 2509 |
|---|---|---|
| Input price | - | $0.50/1M tokens |
| Output price | - | $1.50/1M tokens |
| Providers |
Capabilities
| Capability | Gemini Robotics-ER 1.5 Preview | Mistral Magistral Small 2509 |
|---|---|---|
| Vision | Yes | No |
| Multimodal | Yes | No |
| Reasoning | No | No |
| Function calling | Yes | No |
| Tool use | Yes | 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 differs most on vision: Gemini Robotics-ER 1.5 Preview, multimodal input: Gemini Robotics-ER 1.5 Preview, function calling: Gemini Robotics-ER 1.5 Preview, and tool use: Gemini Robotics-ER 1.5 Preview. 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: Gemini Robotics-ER 1.5 Preview has no token price sourced yet and Mistral Magistral Small 2509 has $0.50/1M input tokens. Provider availability is 1 tracked routes versus 2. Treat unknown pricing as an integration gap, then verify the route you will actually call before estimating production spend.
Choose Gemini Robotics-ER 1.5 Preview when vision-heavy evaluation are central to the workload. Choose Mistral Magistral Small 2509 when provider fit 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
Is Gemini Robotics-ER 1.5 Preview or Mistral Magistral Small 2509 open source?
Gemini Robotics-ER 1.5 Preview is listed under Proprietary. 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.
Which is better for vision, Gemini Robotics-ER 1.5 Preview or Mistral Magistral Small 2509?
Gemini Robotics-ER 1.5 Preview 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, Gemini Robotics-ER 1.5 Preview or Mistral Magistral Small 2509?
Gemini Robotics-ER 1.5 Preview 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.
Which is better for function calling, Gemini Robotics-ER 1.5 Preview or Mistral Magistral Small 2509?
Gemini Robotics-ER 1.5 Preview has the clearer documented function calling signal in this comparison. If function calling is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Which is better for tool use, Gemini Robotics-ER 1.5 Preview or Mistral Magistral Small 2509?
Gemini Robotics-ER 1.5 Preview has the clearer documented tool use signal in this comparison. If tool use is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Where can I run Gemini Robotics-ER 1.5 Preview and Mistral Magistral Small 2509?
Gemini Robotics-ER 1.5 Preview is available on Google AI Studio. 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.
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Last reviewed: 2026-05-22. Data sourced from public model cards and provider documentation.