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Updated: Data as of:
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Model specifications

Specifications for Gemini 4 Hydrogen and GPT-6 Astra. Prices and performance use the selected provider offering.
SpecificationsGemini 4 HydrogenGoogleGPT-6 AstraOpenAI
Provider
Context sizetokens1,048,5761,000,000
Cutoff date2026-032026-04-30
Input costUSD / 1M tokens$1.50$10.00
Output costUSD / 1M tokens$7.50$50.00
Max outputtokens65,536128,000
LatencyTTFT · secondsNot reported365.127
Speedtokens / sec198.15670.564

Blended token cost

USD per 1M tokens · 50% input + 50% output · lower is better

Blended token cost. Gemini 4 Hydrogen: $4.50; GPT-6 Astra: $30.00$4.50Gemini 4 Hydrogen$30.00GPT-6 Astra

Output speed by effort

End-to-end output tokens per second · higher is better

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Output speed by effort. Gemini 4 Hydrogen: Not reported; GPT-6 Astra (low): 40.2; GPT-6 Astra (medium): 43.4; GPT-6 Astra (high): 39.6; GPT-6 Astra (xhigh): 39.2; GPT-6 Astra (max): 37.5Not reportedUnreported40.2Low43.4Medium39.6High39.2Xhigh37.5Max

First-party APIs. Five-day workload averages, checked November 10, 2026. Methodology ↗

  • Gemini 4 Hydrogen: No effort-level measurements available.

Latency by effort

Seconds until the first answer, including thinking · lower is better

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Latency by effort. Gemini 4 Hydrogen: Not reported; GPT-6 Astra (low): 3.29; GPT-6 Astra (medium): 5.69; GPT-6 Astra (high): 61.1; GPT-6 Astra (xhigh): 107.7; GPT-6 Astra (max): 239.21Not reportedUnreported3.29Low5.69Medium61.1High107.7Xhigh239.21Max

First-party APIs. Five-day workload averages, checked November 10, 2026. Methodology ↗

  • Gemini 4 Hydrogen: No effort-level measurements available.

Benchmark performance

4 shared benchmark comparisons. Versions and setups matched.

Gemini 4 HydrogenGPT-6 Astra

Agent Index

Composite of 7 benchmarks · score out of 100 · higher is better

View index ↗
Agent Index. Gemini 4 Hydrogen: Not reported; GPT-6 Astra: 86.2Not reportedGemini 4 Hydrogen86.2GPT-6 Astra
  • Gemini 4 Hydrogen: Needs all 7 benchmark results (4/7 available).