hn • r/hackernews
Comment on: GPT-5.6 Sol, along with Terra and Luna, will launch publicly this Thursday
Very. Fable 5 is incredibly efficient token wise, second only to GPT-5.5 and is far more affordable run-to-run than the pure input/ouput costs would suggest. Task adherence, task inference, tool calling and task assessment are all significantly ahead of GPT-5.5, especially as the later strongly degrades the second compaction comes into the mix, I suspect because of OpenAIs obsessive optimisation of reasoning tokens into a hard to read (and thus also hard to compact) mess.Fable 5 meanwhile has a reliable 1m context window and compaction that the few times I did eval it does also do well. Not qu