Gemini Robotics-ER 1.6 Preview vs GPT-4o Search Preview
Gemini Robotics-ER 1.6 Preview (2026) and GPT-4o Search Preview (2025) are frontier reasoning models from Google DeepMind and OpenAI. Both ship a 128k-token context window. On pricing, Gemini Robotics-ER 1.6 Preview costs $1/1M input tokens versus $2.50/1M 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.
Gemini Robotics-ER 1.6 Preview is ~150% cheaper at $1/1M; pay for GPT-4o Search Preview only for provider fit.
Decision scorecard
Local evidence first| Signal | Gemini Robotics-ER 1.6 Preview | GPT-4o Search Preview |
|---|---|---|
| Best for | reasoning-heavy apps, multimodal apps, and tool-calling agents | provider-routed production |
| Decision fit | RAG, Agents, and Long context | RAG, Long context, and Classification |
| Context window | 128k | 128k |
| Cheapest output | $5/1M tokens | $10/1M tokens |
| Provider routes | 1 tracked | 2 tracked |
| Shared benchmarks | 0 shared | 0 shared |
Decision tradeoffs
- Gemini Robotics-ER 1.6 Preview has the lower cheapest tracked output price at $5/1M tokens.
- Gemini Robotics-ER 1.6 Preview uniquely exposes Vision, Multimodal, and Reasoning in local model data.
- Local decision data tags Gemini Robotics-ER 1.6 Preview for RAG, Agents, and Long context.
- GPT-4o Search Preview has broader tracked provider coverage for fallback and route flexibility.
- Local decision data tags GPT-4o Search Preview for RAG, Long context, and Classification.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output route or tier on this page.
Gemini Robotics-ER 1.6 Preview
$2,050
Cheapest tracked route/tier: Google AI Studio
GPT-4o Search Preview
$4,500
Cheapest tracked route/tier: OpenRouter
Estimated monthly gap: $2,450. Batch, cache, alternate speed tiers, and negotiated pricing are excluded from this local estimate.
Switch friction
- No overlapping tracked provider route is sourced for Gemini Robotics-ER 1.6 Preview and GPT-4o Search Preview; plan for SDK, billing, or endpoint changes.
- GPT-4o Search Preview is $5/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
- Check replacement coverage for Vision, Multimodal, and Reasoning before moving production traffic.
- No overlapping tracked provider route is sourced for GPT-4o Search Preview and Gemini Robotics-ER 1.6 Preview; plan for SDK, billing, or endpoint changes.
- Gemini Robotics-ER 1.6 Preview is $5/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
- Gemini Robotics-ER 1.6 Preview adds Vision, Multimodal, and Reasoning in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2026-04-14 | 2025-02-26 |
| Context window | 128k | 128k |
| Parameters | — | — |
| Architecture | Decoder Only | Decoder Only |
| License | Proprietary | Proprietary |
| Openness | Proprietary | Proprietary |
| Weights | Not released | Not released |
| Code | Unknown | Unknown |
| Commercial use | Commercial use: conditional | Commercial use: conditional |
| Knowledge cutoff | - | 2023-10 |
Pricing and availability
| Pricing attribute | Gemini Robotics-ER 1.6 Preview | GPT-4o Search Preview |
|---|---|---|
| Input price | $1/1M tokens | $2.50/1M tokens |
| Output price | $5/1M tokens | $10/1M tokens |
| Providers |
Capabilities
| Capability | Gemini Robotics-ER 1.6 Preview | GPT-4o Search Preview |
|---|---|---|
| Vision | Yes | No |
| Multimodal | Yes | No |
| Reasoning | Yes | No |
| JSON / Tool use | Yes | No |
| Structured outputs | Yes | Yes |
| Code execution | No | No |
| IDE integration | No | No |
| Computer use | No | No |
| Parallel agents | No | No |
Benchmarks
No shared benchmark scores are currently available for this pair.
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Last reviewed: 2026-06-15. Data sourced from public model cards and provider documentation.