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Claude Fable 5.1 vs GPT 5.6 Sol

Compare Claude Fable 5.1 from Anthropic and GPT 5.6 Sol from OpenAI 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 5.1OpenAIGPT 5.6 Sol
+ Add model · 2/4
Anthropic logo
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
OpenAI logo
GPT 5.6 Sol
OpenAI · text, image → text

GPT‑5.6 Sol sets a new standard for both intelligence and efficiency, achieving state-of-the-art results across coding, knowledge work, cybersecurity, and science while outperforming previous and competing frontier models with fewer tokens and at lower estimated cost.

Input$4 /M
Output$20 /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
GPT 5.6 Sol
Input /M
$11
$4
Output /M
$55
$20
Cache read /M
$0.275
-
Context length
1,000,000
1,050,000
Max output
128,000
128,000
Time to First Token
5.1 s
5.2 s
Throughput
60.2 tok/s
49.9 tok/s
Modalities
textimagepdf
textimage
Supported Parameters
thinkingtoolsfunction callingstructured outputs
toolsthinkingstructured outputs
API Formats
chat_completions · claude_api
chat_completions · responses
Released
September 2, 2026
July 9, 2026

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-5-1gpt-5.6-sol

Tokens / day

-

Requests / day

-

Performance Past 3 Days

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

claude-fable-5-1gpt-5.6-sol

Throughput (tok/s)

-

TTFT (s)

-

Uptime (%)

-

LMArena Benchmarks

LMArena ratings by capability (Bradley-Terry, commonly called Elo). Higher is better.

Text
claude-fable-5-1gpt-5.6-sol
146015001540
Overall
14831504
Coding
15171529
Math
14851485
Hard prompts
15071522
Instruction following
14851489
Multi-turn
14801487
Creative writing
14771487
Longer query
14961515
Chinese
15341534
English
14891509
WebDev Arena
claude-fable-5-1gpt-5.6-sol
1540164017401840
Overall
16171764
React
16241810
HTML
16161678
Gaming
16801893
Simulations
16381872
Data analytics
15691617

Source: LMArena (arena.ai) leaderboard, imported by AIHubMix. Models without published ratings are omitted per chart.

Cost calculator

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

GPT 5.6 Sol
$540 /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, GPT 5.6 Sol?

GPT 5.6 Sol: $20/M output tokens; Claude Fable 5.1: $55/M. Use the cost calculator above to estimate your own workload.

How do their coding arena scores compare?

GPT 5.6 Sol: 1529; Claude Fable 5.1: 1517 (LMArena coding leaderboard).

Which responds faster?

Claude Fable 5.1: 5.1s 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 GPT 5.6 Sol accepts 1,050,000 input tokens. Maximum output per request is 128,000 tokens on Claude Fable 5.1 and 128,000 tokens on GPT 5.6 Sol.

Which one generates tokens faster?

Claude Fable 5.1 at 60.2 tok/s and GPT 5.6 Sol at 49.9 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; GPT 5.6 Sol accepts text and image input and supports tool calling, thinking and structured outputs.

Can I call Claude Fable 5.1 and GPT 5.6 Sol 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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