Anthropic has launched Claude Opus 4.6, which features a 1M token context window. The update appears to include various improvements, such as enhanced scientific reasoning and new coding capabilities, although some details of the release are unclear, including a discrepancy over the name of the launch, with one outlet referring to it as Claude Sonnet 4.6. The launch is seen as a move to support research workflows and potentially compete with other models, such as OpenAI's Codex.