Users report Fable 5 is powerful but slow and logs all data permanently
Fable 5, the latest AI model, is being used in a legal context where it uncovers incriminating evidence that is permanently logged, forcing a policy of only helping non-guilty clients. Users also report the model is extremely slow, taking 25 hours and 3 million tokens to modify a calendar, though it is considered more powerful than Opus 4.8.
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User reports switching legal research workflow to Fable 5, calling it 'incredible'
A legal researcher who used ChatGPT for 6 months and Claude for sanity checks reports switching entirely to Fable 5. Within 2 hours, they exported all analysis from ChatGPT, re-imported evidence including zip files of emails, and now uses Fable 5 for the entire workflow, describing it as 'incredible' and predicting it will help free wrongly convicted prisoners.
OpenAI releases GPT-5.6 with Sol model, claims to outperform Claude Fable
OpenAI released GPT-5.6 on July 10, 2026, featuring a new Sol model that reportedly surpasses Anthropic's Claude Fable on benchmarks. The release was covered by Fireship on YouTube, noting the timing and performance claims.
User benchmarks Fable 5, Sol, and xhigh models on strategic tasks
A user ran a role-based benchmark comparing Fable 5, Sol, and xhigh models on strategic decision memos, execution briefs, and bug repairs. Fable 5 scored 95 on a multi-layer productization decision, slightly ahead of Sol max (94) and xhigh (90). The benchmark is local and not a general intelligence test.
Fable-mode open-source protocol boosts Claude models to Fable 5-grade discipline
A developer released fable-mode, a Claude Code skill and guard hooks that enforce work discipline on any Claude model (e.g., Opus 4.8) to achieve output quality comparable to Fable 5. The protocol includes plan gates, model ceilings, and per-task enforcement, enabling non-frontier models to plan, self-verify, and route sub-agents without requiring Fable 5 itself.
Users report ChatGPT personality change and slowdown after Sol rollout
Following the Sol rollout and GPT+Codex app update, users report ChatGPT's personality has changed, banter is gone, and response times have increased. Some suspect intentional degradation of older models when new ones are released.