Anthropic Formally Makes Claude Opus 4.6’s 1 Million-Token Context Generally Available

As competition in generative artificial intelligence intensifies, the technology rivalry between unicorn startup Anthropic and OpenAI has become a focal point for the tech industry. Each upgrade to Anthropic’s flagship Claude series directly shapes the global cloud-computing ecosystem and the development of enterprise AI applications. It also serves as a key gauge of the future computing costs of commercializing AI.

Anthropic is reportedly preparing to unveil its new flagship model, Claude Opus 5, as early as mid-July 2026. The model is expected to offer lower costs while delivering performance close to Fable 5. A mysterious model code-named Honeycomb previously appeared briefly in the Cursor editor, where testing showed a context limit of 1 million tokens, positioning it to compete directly with OpenAI’s GPT-5.6.

Anthropic launched its flagship Claude Opus 4.7 model in July 2026, targeting complex software engineering, image understanding and enterprise agent tasks. The upgrade also highlights how Anthropic divides responsibilities across its models: its public products balance utility and safety, while its most advanced cybersecurity capabilities are reserved for Claude Mythos under controlled testing.

Claude Opus 4.7 offers three times the visual resolution of its predecessor, along with stronger coding, instruction-following and long-running task performance. It also provides a 1 million-token context window at no extra charge. Anthropic said existing prompts may need adjustment because of changes to the model’s default behavior. Mythos, revealed at the same time, is available for testing only by selected cybersecurity organizations; no public release schedule or pricing has been announced.