Gemini Robotics-ER 1.5 Preview vs GPT-4o Search Preview
Gemini Robotics-ER 1.5 Preview (2025) and GPT-4o Search Preview (2025) are compact production models from Google DeepMind and OpenAI. Gemini Robotics-ER 1.5 Preview ships a 32K-token context window, while GPT-4o Search Preview ships a 128K-token context window. This comparison covers specs, pricing, capabilities, benchmarks, provider availability, and production fit. It focuses on practical selection signals rather than broad model-family marketing.
GPT-4o Search Preview fits 4x more tokens; pick it for long-context work and Gemini Robotics-ER 1.5 Preview for tighter calls.
Specs
| Specification | ||
|---|---|---|
| Released | 2025-03-12 | 2025-02-26 |
| Context window | 32K | 128K |
| Parameters | — | — |
| Architecture | decoder only | decoder only |
| License | Proprietary | Unknown |
| Knowledge cutoff | - | - |
Pricing and availability
| Pricing attribute | Gemini Robotics-ER 1.5 Preview | GPT-4o Search Preview |
|---|---|---|
| Input price | - | $2.5/1M tokens |
| Output price | - | $10/1M tokens |
| Providers |
Capabilities
| Capability | Gemini Robotics-ER 1.5 Preview | GPT-4o Search Preview |
|---|---|---|
| Vision | Yes | No |
| Multimodal | Yes | No |
| Reasoning | No | No |
| Function calling | Yes | No |
| Tool use | Yes | No |
| Structured outputs | No | Yes |
| Code execution | 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, tool use: Gemini Robotics-ER 1.5 Preview, and structured outputs: GPT-4o Search 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 GPT-4o Search Preview has $2.5/1M input tokens. 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 Gemini Robotics-ER 1.5 Preview when vision-heavy evaluation are central to the workload. Choose GPT-4o Search Preview when long-context analysis and larger context windows 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, Gemini Robotics-ER 1.5 Preview or GPT-4o Search Preview?
GPT-4o Search Preview supports 128K tokens, while Gemini Robotics-ER 1.5 Preview supports 32K tokens. That gap matters most for long documents, large codebases, retrieval-heavy agents, and conversations where earlier context must remain visible.
Is Gemini Robotics-ER 1.5 Preview or GPT-4o Search Preview open source?
Gemini Robotics-ER 1.5 Preview is listed under Proprietary. GPT-4o Search Preview is listed under Unknown. 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 GPT-4o Search Preview?
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 GPT-4o Search Preview?
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 GPT-4o Search Preview?
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.
Where can I run Gemini Robotics-ER 1.5 Preview and GPT-4o Search Preview?
Gemini Robotics-ER 1.5 Preview is available on Google AI Studio. GPT-4o Search Preview is available on OpenRouter. Provider coverage can affect latency, region availability, compliance posture, and fallback options. Use this as a quick comparison signal, then confirm the provider-specific limits before committing to production.
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Last reviewed: 2026-05-11. Data sourced from public model cards and provider documentation.