Anthropic and OpenAI Release Claude Opus 5.5 and GPT-6 Models, Sparking API Price War
Anthropic released Claude Opus 5.5, followed shortly by OpenAI releasing GPT-6 Sol and GPT-6 Luna. The new GPT-6 models feature dramatic price cuts, operating at half the price of their previous GPT-5.6 equivalents. This wave of major model releases intensifies price competition across the frontier AI landscape, drastically lowering costs for developers building AI applications. Ultra-low rates like GPT-6 Luna's $0.10/M input tokens make high-performance model integration far more economically feasible. GPT-6 Luna is priced at $0.10/M input and $0.50/M output tokens, competing closely with budget models while offering top-tier performance. Claude Opus 5.5 also received price adjustments down to $4/M input and $20/M output, directly matching GPT-6 Sol pricing.
## BACKGROUND
Leading AI labs release families of large language models (LLMs) with varying trade-offs between intelligence, speed, and cost to serve different developer use cases. API access is typically billed per million input and output tokens processed by the model.