Compare Gemini 4 Carbon from Google and Claude Fable 5.2 from Anthropic on key metrics including benchmarks, price, context length, and other model features. Access both models and hundreds of others through the AIHubMix API.
Gemini 4 Carbon
Claude Fable 5.2Gemini 4 Carbon is Google DeepMind’s multimodal model for complex coding, long-running agent workflows, and cybersecurity defense. Building on Gemini 4 Argon, it improves software engineering, vulnerability detection and remediation, multimodal understanding, and execution across challenging, multi-step tasks.
Claude Fable 5.2 is Anthropic’s multimodal reasoning model for complex coding, deep research, and long-running agent workflows. It supports text and image inputs, with improved reasoning, coding, and visual understanding, and generates output up to 30% faster than Fable 5.1.
Prices are per million tokens. Time to First Token and throughput are rolling averages measured on AIHubMix.
Promotional prices show the discounted rate; see each model page for promotion windows.
Daily traffic served through AIHubMix — how demand for each model is trending.
Measured on real AIHubMix traffic, hourly buckets. Gaps mean no traffic in that hour.
LMArena ratings by capability (Bradley-Terry, commonly called Elo). Higher is better.
Source: LMArena (arena.ai) leaderboard, imported by AIHubMix. Models without published ratings are omitted per chart.
Estimate your monthly bill for the same workload on each model.
Monthly = daily × 30. Discounted rates applied where a promotion is active.
Gemini 4 Carbon: $10/M output tokens; Claude Fable 5.2: $44/M. Use the cost calculator above to estimate your own workload.
Claude Fable 5.2: 7.7s time to first token measured on AIHubMix; see the live performance charts above for how each model behaves across the day.
Gemini 4 Carbon accepts 1,048,576 and Claude Fable 5.2 accepts 1,000,000 input tokens. Maximum output per request is 65,536 tokens on Gemini 4 Carbon and 128,000 tokens on Claude Fable 5.2.
Claude Fable 5.2 at 88.1 tok/s and Gemini 4 Carbon at 77.2 tok/s, measured as output throughput on AIHubMix — a separate metric from time to first token.
Gemini 4 Carbon accepts text, image, video, audio and PDF input; Claude Fable 5.2 accepts text, image and PDF input.
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