Fable 5.1 beats Fable 5. Opus is harder to replace
Fable 5.1 leads its predecessor on long agent tasks, but Opus 5 stays close at half the base token price. I checked the benchmarks and first reports.
fable-5
Every article tagged fable-5, newest first.
I'm torn between Claude and Codex
Codex gives me more usage, cleaner frontend work, and a smoother app. Claude still finishes my large multi-agent features in hours instead of all day.
Opus 5 is not as bad as the internet says
After five weeks of daily use, I think Opus 5 is much better than its online reputation. Clear plans and smaller tasks reveal a strong coding model.
GPT-5.6 vs Claude 5: why the benchmarks disagree
I compared Sol, Terra, Opus 5 and Fable 5 across coding benchmarks. The winner changes with the task, effort setting, agent setup and budget.
GPT-5.6 Sol over-engineers. I still use it
In my release audit, GPT-5.6 Sol found nearly six times as many possible issues as Fable 5. Most failed triage, so I changed how I use it on coding tasks.
Opus 5 is a great employee but a frustrating boss
Opus 5 matches Fable 5 on benchmarks at half the token price, yet it can be painful to supervise. Here is where Fable still earns its place.