Kimi K3.1 is basically the open-weight version of Opus 5.5 / GPT-6 Astra, but way cheaper I asked them to build a whale breaching scene. Kimi: $0.75 Opus 5.5: $3.01 Astra: $2.00 Gemini 4 Argon: $2.30 Comparable quality at a fraction of the cost.