The Information reported on April 15 that Anthropic plans to ship Claude Opus 4.7 within days, paired with a new AI tool for designing websites and slide decks. One day later, nothing has landed publicly. The leak lines up with Anthropic’s recent cadence — quick, iterative refreshes on Opus rather than a single headline-grabbing jump.
Opus 4.7 reads as a sharpening pass, not a reinvention. Leaked draft documents claim “large margin” gains over 4.6 on multi-step reasoning, code understanding, debugging, and long-horizon planning. No hard numbers made it into the leak. For context, Opus 4.6 already scores 80.8% on SWE-bench Verified and 91.3% on GPQA Diamond — the ceiling is thin, which is probably why Anthropic is emphasizing agentic reliability and alignment calibration instead of fresh benchmark records. The companion design tool is arguably the more interesting shipment. It puts Claude in direct competition with Figma’s AI bets and Canva’s Magic suite.
Then there is Spud. That’s OpenAI’s codename, not Anthropic’s — a point that keeps getting muddled in the rumor mill. Sam Altman told staff the model is a “very strong” release that could “really accelerate the economy.” Pretraining finished March 24. Polymarket traders assign 78% odds to a launch before April 30.
Whether Spud ships as GPT-5.5 or GPT-6 is a coin flip OpenAI has not publicly resolved. Greg Brockman described it as “two years of research” with a “big model feel.” That phrasing matters. It signals the kind of step where the naming question stops being marketing and starts being a judgment about how much the scaling curve actually bent.
The timing is not a coincidence. Anthropic sitting on Opus 4.7 for months, then pushing it out the door the same week Spud finishes cooking, looks like a scheduled collision. Anthropic wins if developers stay inside the Claude Code ecosystem through whatever hype cycle OpenAI manufactures next. OpenAI wins if Spud lands well enough to pull them back.
The same leaks surfaced something that may matter more than either model. Internal references to “Capybara” and “Mythos” — codenames for a tier sitting above Opus, which Anthropic is reportedly piloting with a handful of enterprise customers. If that’s real, Opus 4.7 is not the interesting story. It’s the distraction.
Everything here is pre-release reporting. Neither company has formally announced anything, and Anthropic has not commented on the leaked documents. Both will almost certainly move within six weeks. If you’re building on these APIs right now, the practical takeaway is short: don’t commit to long migration work on Opus 4.7 until you’ve seen what’s sitting one layer above it.
Sources
The Information Polymarket Geeky Gadgets
This article is AI-generated.
