Gemini 2.5 Pro Preview 06-05 vs Gemini Robotics-ER 1.6 Preview
Gemini 2.5 Pro Preview 06-05 (2025) and Gemini Robotics-ER 1.6 Preview (2026) are frontier reasoning models from Google DeepMind. Gemini 2.5 Pro Preview 06-05 ships a 1M-token context window, while Gemini Robotics-ER 1.6 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.
Gemini 2.5 Pro Preview 06-05 fits 8x more tokens; pick it for long-context work and Gemini Robotics-ER 1.6 Preview for tighter calls.
Decision scorecard
Local evidence first| Signal | Gemini 2.5 Pro Preview 06-05 | Gemini Robotics-ER 1.6 Preview |
|---|---|---|
| Decision fit | Coding, RAG, and Agents | RAG, Agents, and Long context |
| Context window | 1M | 128K |
| Cheapest output | $10/1M tokens | - |
| Provider routes | 1 tracked | 0 tracked |
| Shared benchmarks | 0 rows | 0 rows |
Decision tradeoffs
- Gemini 2.5 Pro Preview 06-05 has the larger context window for long prompts, retrieval packs, or transcript analysis.
- Gemini 2.5 Pro Preview 06-05 has broader tracked provider coverage for fallback and procurement flexibility.
- Gemini 2.5 Pro Preview 06-05 uniquely exposes Code execution in local model data.
- Local decision data tags Gemini 2.5 Pro Preview 06-05 for Coding, RAG, and Agents.
- 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.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output prices on this page.
Gemini 2.5 Pro Preview 06-05
$3,500
Cheapest tracked route: OpenRouter
Gemini Robotics-ER 1.6 Preview
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 Gemini 2.5 Pro Preview 06-05 and Gemini Robotics-ER 1.6 Preview; plan for SDK, billing, or endpoint changes.
- Check replacement coverage for Code execution before moving production traffic.
- Gemini Robotics-ER 1.6 Preview adds Vision, Multimodal, and Reasoning in local capability data.
- No overlapping tracked provider route is sourced for Gemini Robotics-ER 1.6 Preview and Gemini 2.5 Pro Preview 06-05; plan for SDK, billing, or endpoint changes.
- Check replacement coverage for Vision, Multimodal, and Reasoning before moving production traffic.
- Gemini 2.5 Pro Preview 06-05 adds Code execution in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2025-03-25 | 2026-04-14 |
| Context window | 1M | 128K |
| Parameters | — | — |
| Architecture | decoder only | decoder only |
| License | Unknown | Proprietary |
| Knowledge cutoff | - | - |
Pricing and availability
| Pricing attribute | Gemini 2.5 Pro Preview 06-05 | Gemini Robotics-ER 1.6 Preview |
|---|---|---|
| Input price | $1.25/1M tokens | - |
| Output price | $10/1M tokens | - |
| Providers | - |
Capabilities
| Capability | Gemini 2.5 Pro Preview 06-05 | Gemini Robotics-ER 1.6 Preview |
|---|---|---|
| Vision | No | Yes |
| Multimodal | No | Yes |
| Reasoning | No | Yes |
| Function calling | No | Yes |
| Tool use | No | Yes |
| Structured outputs | Yes | Yes |
| Code execution | Yes | No |
Benchmarks
No shared benchmark rows are currently sourced for this pair.
Deep dive
The capability footprint differs most on vision: Gemini Robotics-ER 1.6 Preview, multimodal input: Gemini Robotics-ER 1.6 Preview, reasoning mode: Gemini Robotics-ER 1.6 Preview, function calling: Gemini Robotics-ER 1.6 Preview, tool use: Gemini Robotics-ER 1.6 Preview, and code execution: Gemini 2.5 Pro Preview 06-05. Both models share structured outputs, 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 2.5 Pro Preview 06-05 has $1.25/1M input tokens and Gemini Robotics-ER 1.6 Preview has no token price sourced yet. Provider availability is 1 tracked routes versus 0. Treat unknown pricing as an integration gap, then verify the route you will actually call before estimating production spend.
Choose Gemini 2.5 Pro Preview 06-05 when coding workflow support, larger context windows, and broader provider choice are central to the workload. Choose Gemini Robotics-ER 1.6 Preview when reasoning depth are more important. For production, rerun your own prompts through the exact provider, region, and tool stack you plan to ship.
FAQ
Which has a larger context window, Gemini 2.5 Pro Preview 06-05 or Gemini Robotics-ER 1.6 Preview?
Gemini 2.5 Pro Preview 06-05 supports 1M tokens, while Gemini Robotics-ER 1.6 Preview supports 128K tokens. That gap matters most for long documents, large codebases, retrieval-heavy agents, and conversations where earlier context must remain visible.
Is Gemini 2.5 Pro Preview 06-05 or Gemini Robotics-ER 1.6 Preview open source?
Gemini 2.5 Pro Preview 06-05 is listed under Unknown. Gemini Robotics-ER 1.6 Preview 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 2.5 Pro Preview 06-05 or Gemini Robotics-ER 1.6 Preview?
Gemini Robotics-ER 1.6 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 2.5 Pro Preview 06-05 or Gemini Robotics-ER 1.6 Preview?
Gemini Robotics-ER 1.6 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 reasoning mode, Gemini 2.5 Pro Preview 06-05 or Gemini Robotics-ER 1.6 Preview?
Gemini Robotics-ER 1.6 Preview 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.
Where can I run Gemini 2.5 Pro Preview 06-05 and Gemini Robotics-ER 1.6 Preview?
Gemini 2.5 Pro Preview 06-05 is available on OpenRouter. Gemini Robotics-ER 1.6 Preview is available on the tracked providers still being sourced. Provider coverage can affect latency, region availability, compliance posture, and fallback options.
Continue comparing
Last reviewed: 2026-05-11. Data sourced from public model cards and provider documentation.