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OpenAI's GPT-5.6 Sol Undercuts Anthropic's Claude Fable 5 on Price as Access Debate Intensifies

July 12, 2026 at 13:48 EDT

Foundation Models
Software Dev & Coding
AI Agents

OpenAI's newly released GPT-5.6 Sol is matching or exceeding Anthropic's flagship Claude Fable 5 on key coding and agentic benchmarks while charging roughly a quarter of the price, sharpening a debate over whether Claude's tightly capped subscriptions still justify their cost.

July 9, 2026 · OpenAI

GPT-5.6 Sol Matches Claude Fable 5 — at a Quarter of the Price

OpenAI's new flagship equals or beats Anthropic's frontier model on key coding and agentic benchmarks while charging materially less per token, reframing the frontier race around economics and access rather than raw capability.

~¼

Sol's cost vs Fable 5 for comparable output

+13.1

Sol's lead on Agents' Last Exam (53.6 vs ~40.5)

<½

Tokens & time to complete comparable work

Price per 1M tokens — same job, half the rate

Both models offer ~1M-token context windows

INPUT

Sol

$10

Fable 5

OUTPUT

$30

Sol

$50

Fable 5

Benchmark scores — closely matched, Sol ahead

Agents' Last Exam

Sol

53.6

Fable 5

40.5

Artificial Analysis Coding Agent Index

Sol

Fable 5

77.2

Why users lean to Sol — "the worker"

Fable-level output at ~¼ the price
Sustainable in continuous use, always-on
Fast, low-cost agentic tasks, games, prototypes

Fable 5 concerns — "the manager"

Heavy token use can drain a Max plan fast
One session can burn a 5-hour window
Still valued as more creative & strategic

Frontier competition now turns on economics and access, not raw capability alone.

With ~1M-token context on both sides and closely matched benchmarks, price per token and always-on availability are emerging as the decisive factors for coding and agentic workloads.

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