Switching to GPT-5.6 in production: it's a schema, cache, and harness problem — not a model swap
Article summary
Quick briefing — cleaned from the original RSS feed
Ploy builds production marketing websites with an AI agent. They've been benchmarking every frontier release for months. Nothing beat Claude Opus until GPT-5.6 Sol — 2.2× faster, 27% cheaper, better visual scores. Then they actually tried to ship it. That's where it got interesting. "We use Vercel's AI SDK, but switching from Claude Opus 4.8 to GPT-5.6 Sol still exposed provider-specific assumptions throughout our stack." What the numbers look like Claude Opus 4.8 GPT-5.6 Sol Cost (per build)…
1Key Takeaways
- Ploy builds production marketing websites with an AI agent.
- They've been benchmarking every frontier release for months.
- Nothing beat Claude Opus until GPT-5.6 Sol — 2.2× faster, 27% cheaper, better visual scores.
- Then they actually tried to ship it.
2AIWedia Score
9/10
Must-read — high impact for AI builders
Based on source trust, recency, category impact, and story depth.
3Why it matters
Coding AI shifts how fast software ships and how much human review each change needs. DEV — AI reports that ploy builds production marketing websites with an AI agent.
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