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Claude Fable 5.1 vs Gemini 4 Argon

Compare Claude Fable 5.1 from Anthropic and Gemini 4 Argon from Google on key metrics including benchmarks, price, context length, and other model features. Access both models and hundreds of others through the AIHubMix API.

AnthropicClaude Fable 5.1GoogleGemini 4 Argon
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Claude Fable 5.1
Anthropic · text, image, pdf → text

Claude-fable-5-1 is Anthropic's most capable newly released model, suitable for the most demanding reasoning and long-running agent work. Claude Fable 5.1, while keeping input and output prices the same as Claude Fable 5, reduces cache read prices to one quarter of the original and is more capable for long-running agent programming, multi-step research, and document, spreadsheet, and slide processing. (The model is extremely expensive and not recommended for casual use.)

Input$11 /M
Output$55 /M
Cache read$0.275 /M
Details
Google logo
Gemini 4 Argon
Google · text, image, video, audio, pdf → text

Gemini 4 Argon is Google DeepMind’s multimodal reasoning model for complex software engineering, financial research, legal drafting, and cybersecurity defense. It supports sustained reasoning across long, multi-step workflows, combining coding capabilities with chart and long-video understanding. It can also autonomously discover, validate, and patch software vulnerabilities.

Input$2 /M
Output$10 /M
Cache read$0.1 /M
Details

Pricing & Specifications

Prices are per million tokens. Time to First Token and throughput are rolling averages measured on AIHubMix.

Claude Fable 5.1
Gemini 4 Argon
Input /M
$11
$2
Output /M
$55
$10
Cache read /M
$0.275
$0.1
Context length
1,000,000
1,048,576
Max output
128,000
65,536
Time to First Token
7.6 s
6.9 s
Throughput
53.3 tok/s
44.0 tok/s
Modalities
textimagepdf
textimagevideoaudiopdf
Supported Parameters
thinkingtoolsfunction callingstructured outputs
API Formats
chat_completions · claude_api
Released
September 2, 2026
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Promotional prices show the discounted rate; see each model page for promotion windows.

Activity Past 30 Days

Daily traffic served through AIHubMix — how demand for each model is trending.

claude-fable-5-1gemini-4-argon

Tokens / day

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Requests / day

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Performance Past 3 Days

Measured on real AIHubMix traffic, hourly buckets. Gaps mean no traffic in that hour.

claude-fable-5-1gemini-4-argon

Throughput (tok/s)

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TTFT (s)

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Uptime (%)

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Cost calculator

Estimate your monthly bill for the same workload on each model.

Gemini 4 Argon
$270 /mo
Claude Fable 5.1
$1,485 /mo

Monthly = daily × 30. Discounted rates applied where a promotion is active.

FAQ

Which is cheaper: Claude Fable 5.1, Gemini 4 Argon?

Gemini 4 Argon: $10/M output tokens; Claude Fable 5.1: $55/M. Use the cost calculator above to estimate your own workload.

Which responds faster?

Gemini 4 Argon: 6.9s time to first token measured on AIHubMix; see the live performance charts above for how each model behaves across the day.

How large is each context window?

Claude Fable 5.1 accepts 1,000,000 and Gemini 4 Argon accepts 1,048,576 input tokens. Maximum output per request is 128,000 tokens on Claude Fable 5.1 and 65,536 tokens on Gemini 4 Argon.

Which one generates tokens faster?

Claude Fable 5.1 at 53.3 tok/s and Gemini 4 Argon at 44.0 tok/s, measured as output throughput on AIHubMix — a separate metric from time to first token.

What inputs and capabilities does each model support?

Claude Fable 5.1 accepts text, image and PDF input and supports thinking, tool calling, function calling and structured outputs; Gemini 4 Argon accepts text, image, video, audio and PDF input.

Can I call Claude Fable 5.1 and Gemini 4 Argon with the same API key?

Yes. AIHubMix serves every model on this page behind one OpenAI-compatible endpoint, so switching between them is a one-line change to the model field — no second account, key or SDK.

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