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Comparison · 2 models · Updated Nov 2, 2026

Gemini Robotics-ER 1.6 Preview vs GPT-5 Chat

Gemini Robotics-ER 1.6 Preview comes out ahead, 46 to 31 on our weighted score, and it is the cheaper option too.

  1. Our pick

    Google

    Gemini Robotics-ER 1.6 Preview

    Released Apr 14, 2026

    46/100
    • ECI—
    • Price$1.00 / $5.00
    • Context131K
    Full specs Remove Gemini Robotics-ER 1.6 Preview

  2. OpenAI

    GPT-5 Chat

    Released Aug 7, 2025

    31/100
    • ECI—
    • Price$1.25 / $10.00
    • Context400K
    Full specs Remove GPT-5 Chat

  3. Add a model

    Make it a three-way comparison.

01 — Verdict

Gemini Robotics-ER 1.6 Preview is our pick

Gemini Robotics-ER 1.6 Preview is the better all-round choice, scoring 46/100 against GPT-5 Chat (31). It leads on price and inputs & features. GPT-5 Chat wins on context window. The score weighs price 50%, inputs & features 30%, context window 20%. None of the shared benchmarks cover every model here yet, so capability is left out of this verdict.

  • CapabilityNot enough dataNo independent benchmark covers every model here yet
  • Lowest priceGemini Robotics-ER 1.6 PreviewGemini Robotics-ER 1.6 Preview $2.00 · GPT-5 Chat $3.44 per 1M tokens (3:1 blend)
  • Longest contextGPT-5 ChatGPT-5 Chat 400,000 · Gemini Robotics-ER 1.6 Preview 131,072 tokens
  • Widest inputsGemini Robotics-ER 1.6 PreviewGemini Robotics-ER 1.6 Preview: Text, Images, Audio, Video · GPT-5 Chat: Text, Images
  • Self-hostingNo open weightsBoth are available only through APIs
How the score is built
MeasureWeightGemini Robotics-ER 1.6 PreviewGPT-5 Chat
Price50%3423
Inputs & features30%8035
Context window20%2544
Overall100%46/10031/100

Left out because at least one model lacks the data: capability. The remaining weights were rescaled.

02 — Side by side

Every spec in one table

Highlighted cells lead their row. Dashes mean the data is not published.

Gemini Robotics-ER 1.6 Preview vs GPT-5 Chat specifications side by side
SpecificationGemini Robotics-ER 1.6 PreviewGoogleGPT-5 ChatOpenAI
Capability
Capabilities Index (ECI)——
ECI rank——
Price per million tokens
Input$1.00 (best)$1.25
Output$5.00 (best)$10.00
Cached input——
Blended (3:1)$2.00 (best)$3.44
Long-context rateSame rateSame rate
Price sourceMedian of 1 providersMedian of 5 providers
Limits
Context window131,072 tokens400,000 tokens (best)
Max output65,536 tokens128,000 tokens (best)
Inputs and features
TextYesYes
ImagesYesYes
PDFsNoNo
AudioYesNo
VideoYesNo
ReasoningYesYes
Tool callingYesNo
Structured outputNoNo
Availability
WeightsProprietaryProprietary
API model ID——
API providers15 (best)
ReleasedApr 14, 2026Aug 7, 2025
Knowledge cutoffJan 2025Sep 30, 2024
03 — Cost

What would a month cost?

Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.

  • Gemini Robotics-ER 1.6 Preview$20.00
  • GPT-5 Chat$32.50
04 — Questions

Which should you choose?

Which is better: Gemini Robotics-ER 1.6 Preview or GPT-5 Chat?

Gemini Robotics-ER 1.6 Preview is the better all-round choice, scoring 46/100 against GPT-5 Chat (31). It leads on price and inputs & features. GPT-5 Chat wins on context window. The score weighs price 50%, inputs & features 30%, context window 20%. None of the shared benchmarks cover every model here yet, so capability is left out of this verdict.

Which is cheaper, Gemini Robotics-ER 1.6 Preview or GPT-5 Chat?

Gemini Robotics-ER 1.6 Preview is cheaper at $1.00 input / $5.00 output per million tokens (median across 1 API provider). GPT-5 Chat costs $1.25 input / $10.00 output per million tokens (median across 5 API providers). At a typical mix of three input tokens to one output token, that is $2.00 per million tokens for Gemini Robotics-ER 1.6 Preview versus $3.44 for GPT-5 Chat (1.7× as much).

Which scores higher on benchmarks?

There is no independent benchmark that covers both models yet. Gemini Robotics-ER 1.6 Preview has not been scored yet and GPT-5 Chat has not been scored yet.

Which is better for coding?

There are no published SWE-bench Verified results for Gemini Robotics-ER 1.6 Preview and GPT-5 Chat yet, so there is no like-for-like coding score. Test both on a sample of your own tasks. Note that GPT-5 Chat does not support tool calling, which most coding agents need.

Which has the bigger context window?

GPT-5 Chat has the largest context window at 400,000 tokens, against 131,072 for Gemini Robotics-ER 1.6 Preview. Maximum output per response: Gemini Robotics-ER 1.6 Preview up to 65,536, GPT-5 Chat up to 128,000 tokens.

Which can read images, PDFs, audio or video?

Gemini Robotics-ER 1.6 Preview accepts text, images, audio and video; GPT-5 Chat accepts text and images. Gemini Robotics-ER 1.6 Preview handles the widest range of inputs.

Are any of these open source?

No. Gemini Robotics-ER 1.6 Preview and GPT-5 Chat are proprietary and only available through APIs and apps.

Which is newer?

Gemini Robotics-ER 1.6 Preview is the newest, released Apr 14, 2026. GPT-5 Chat came out Aug 7, 2025. Knowledge cutoff: Gemini Robotics-ER 1.6 Preview Jan 2025, GPT-5 Chat Sep 30, 2024.

How do you decide the winner?

Each model gets a 0–100 score on capability (50%, independent benchmark results); price (25%, blended price per million tokens (3 input : 1 output), log scale); inputs & features (15%, image, PDF, audio and video input, tool calling, structured output and reasoning); context window (10%, maximum tokens per request, log scale). Dimensions missing for any model are dropped and the remaining weights rescaled, so every model is judged on the same evidence. Specs and prices come from public model listings and the labs’ own API pages; capability scores come from independent benchmark runs. Data updated Nov 2, 2026.

05 — Keep comparing

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