Key Info
Anthropic's new Opus 5.5 model achieves better performance than Fable 5.1 on AAII at approximately 2.5x lower cost, while OpenAI released GPT-6 Sol and Luna, both priced at half of their 5.6 predecessors.
Highlights
- Opus 5.5 beats Fable 5.1 on AAII benchmark with ~2.5x cost reduction.
- OpenAI introduces GPT-6 Sol and Luna at half the price of previous 5.6 models.
- Both releases signal an unprecedented jump in frontier AI performance and price drop.
