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 — Anthropic
Claude Fable 5.2 is Anthropic's current Fable model, released on November 9, 2026, for demanding reasoning and long-horizon agentic work, at lower prices than Claude Fable 5.1. It takes text and image input, returns text, uses adaptive thinking that is always on, and has a June 2026 reliable knowledge cutoff.
Model B — Google DeepMind
Gemini 4 Argon is a model from Google, made generally available in the Gemini API on October 13, 2026, which Google calls its flagship reasoning model, for complex software engineering, mathematical and scientific problem solving and autonomous agents. It takes text, image, video, audio and PDF input and returns text; its model card describes a sparse mixture-of-experts transformer with a March 2026 knowledge cutoff.
| Property | Claude Fable 5.2 | Gemini 4 Argon |
|---|---|---|
| Released | Nov 9, 2026 | Oct 13, 2026 |
| Developer | Anthropic | Google DeepMind |
| Type | reasoning | reasoning |
| License | proprietary | proprietary |
| Context window | — | 1,048,576 |
| Parameters | — | — |
| Developer status | — | — |
| Input $/M tokens | $8.00 | $2.00 |
| Output $/M tokens | $40.00 | $10.00 |
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=claude-fable-5-2&b=gemini-4-argon. CORS is open. Citation guidance: /about/editorial-process.