Five months after Opus 4.6, Anthropic shipped Opus 4.7 today. Point releases are becoming the norm. Here's what actually changed.

1. Opus 4.7 is the flagship. Mythos is the frontier.

Opus 4.7 is Anthropic's new flagship for general availability. It shipped on day one to Claude.ai, the API, Claude Code, Amazon Bedrock, Google Vertex AI, Microsoft Foundry, and GitHub Copilot — at the same $5/$25 per million input/output tokens as 4.6 (though a new tokenizer can inflate effective cost up to 35%). Above it sits Mythos, a frontier model Anthropic announced earlier this month and gated to roughly 40 vetted organizations through Project Glasswing. Mythos is not for sale. Opus 4.7 is the model you can actually use.

2. Coding is the headline.

Almost all the published gains concentrate in software engineering:

• SWE-bench Pro: 53.4 → 64.2 (ahead of GPT-5.4 at 57.7 and Gemini 3.1 Pro at 54.2)
• SWE-bench Verified: 80.8 → 87.6
• Cursor internal benchmark: 58% → 70%
• Rakuten-SWE-Bench: 3× more production tasks resolved vs 4.6

Enterprise numbers from Anthropic's launch partners: Databricks reports 21% fewer errors on document reasoning. Replit says "same quality at lower cost." Box reports 56% fewer model calls and 50% fewer tool calls.

3. The behavior changed, not just the score.

This is the part worth noting if you run prompts or agents today. Opus 4.7 reasons more, reaches for tools less, follows instructions more literally, and checks its own work before reporting back. It also writes in a more direct tone and adapts response length to the task.

If you've hard-coded scaffolding into prompts ("summarize every N steps," verbosity constraints, "use this tool first"), some of it is now redundant or counter-productive. Anthropic recommends a new xhigh effort level as the default for coding and agentic work.

4. Vision got a serious upgrade.

Opus 4.7 can process images up to ~3.75 megapixels — roughly 3× the resolution of prior Opus models. For computer-use agents, there's also a practical detail: pointing and bounding-box coordinates are now 1:1 with actual pixels, so there's no scale-factor math before clicking or highlighting something. Small on paper, meaningful for anyone building UI automation.

5. Safety got a new layer.

Opus 4.7 is the first production model shipping with Project Glasswing — runtime safeguards that detect and block prohibited cybersecurity requests like exploitation or credential hunting. Anthropic also deliberately trained its cyber capabilities down, keeping them below Mythos. Legitimate security researchers can apply for a verification program to get reduced restrictions.

The framing from Anthropic: 4.7 is the testbed for safeguards that eventually let them broaden access to Mythos-class models.

Will share more once I've put it to real use.