Anthropic Raises Message Batches Output Cap to 300K Tokens
New output-300k beta header on Opus 4.6 and Sonnet 4.6 enables single-turn long-form generation, useful for full-document drafts, large refactors, and structured exports.
New output-300k beta header on Opus 4.6 and Sonnet 4.6 enables single-turn long-form generation, useful for full-document drafts, large refactors, and structured exports.