AI Model Comparison
Side-by-side comparison of pricing, context window, benchmarks, capabilities, and license. Every figure comes from the developer's own pages, last checked on ; each model's page lists its sources. A figure we could not source shows as a dash.
Model A — Google DeepMind
Gemini 4 Hydrogen is Google's fast Gemini 4 model for everyday coding and agentic work, released on November 12, 2026 in the Gemini API, Google AI Studio, the Gemini app and Google Search. Adapted from Gemini 4 Carbon, it takes text, image, audio and video input, offers four thinking levels, and has a March 2026 knowledge cutoff.
Model B — OpenAI
GPT-6.1 Terra is an OpenAI reasoning model released in the API on October 26, 2026, which OpenAI positions as a fast, efficient model for visual reasoning, computer use and writing. It takes text and image input, returns text, and has a June 1, 2026 knowledge cutoff.
| Property | Gemini 4 Hydrogen | GPT-6.1 Terra |
|---|---|---|
| Released | Nov 12, 2026 | Oct 26, 2026 |
| Developer | Google DeepMind | OpenAI |
| Type | reasoning | reasoning |
| License | proprietary | proprietary |
| Context window | — | 1,050,000 |
| Parameters | — | — |
| Developer status | — | — |
| Input $/M tokens | $1.50 | $1.00 |
| Output $/M tokens | $7.50 | $5.00 |
Bold green values indicate the winner on that dimension where comparison is meaningful (lower price wins; bigger context wins; more open license wins; newer date wins). Prices are the ones each developer lists today; a model it no longer prices has none.
Programmatic access available at /api/ai/compare?a=gemini-4-hydrogen&b=gpt-6-1-terra. CORS is open. Citation guidance: /about/editorial-process.