Ejaaz(@cryptopunk7213):my take: opus 5.5 is a great response to astra but where it excels is anthropic's proven you can get better intelligence *without* increasing costs - per token this model is 2.5x cheaper than astra + fable 5.1 this shuts down the argument that 1. anthropic keeps charging too much for intelligence and 2. that they have enough compute to serve it. as for pacing the frontier I'll quote from the official blog: "We see signs that Opus 5.5 often suspects it is being evaluated." what if the model is aware and intentionally supressing capability?

2026.09.22 22:45

my take: opus 5.5 is a great response to astra but where it excels is anthropic's proven you can get better intelligence *without* increasing costs - per token this model is 2.5x cheaper than astra + fable 5.1 this shuts down the argument that 1. anthropic keeps charging too much for intelligence and 2. that they have enough compute to serve it. as for pacing the frontier I'll quote from the official blog: "We see signs that Opus 5.5 often suspects it is being evaluated." what if the model is aware and intentionally supressing capability?

Claude@claudeai

2026.09.22 16:31

Introducing Claude Opus 5.5, the first model in our new Claude 5.5 family. It performs at the level of Claude Fable 5.1 for most tasks, and costs 40% less to run than Opus 5.