Rumor roundup: GPT-6.1 Astra, Terra and 6.5 all rumored

Tim Jayas @TimJayasOriginally posted 2026.10.20

Open original on X

i was expecting just fable 5.5 and gpt-6.1 astra to be released but now we're getting rumors of opus 5.6, gpt-6.1 terra and gpt-6.5 models i love the competition between anthropic and openai. it's the only reason we're seeing so many new models in a short span of time