Claude Opus 4.7

Claude Opus 4.7 released with 1M context, new tokenizer affecting effective costs

Claude Opus 4.7 is Anthropic's reasoning-class model released April 14, 2026, supporting text, image, and document inputs with a 1M token context window and 128K maximum output. The model maintains the same $5/$25 per million token pricing as Opus 4.6, but introduces a new tokenizer that can increase token counts by up to 35% on identical inputs, raising effective costs per request by 0-35% depending on content type. It is available via API and generally available as of the release date.