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LIVE
OPUS 4.7$15 / $75per Mtok
SONNET 4.6$3 / $15per Mtok
GPT-5.5$10 / $30per Mtok
GEMINI 3.1$3.50 / $10.50per Mtok
SWE-BENCHleader Claude Opus 4.772.1%
MMLU-PROleader Opus 4.788.4
VALS FINANCEleader Opus 4.764.4%
AFTAv1.0 whitepaper live at /whitepaper
OPUS 4.7$15 / $75per Mtok
SONNET 4.6$3 / $15per Mtok
GPT-5.5$10 / $30per Mtok
GEMINI 3.1$3.50 / $10.50per Mtok
SWE-BENCHleader Claude Opus 4.772.1%
MMLU-PROleader Opus 4.788.4
VALS FINANCEleader Opus 4.764.4%
AFTAv1.0 whitepaper live at /whitepaper
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AI Substrate Changelog

A forward-only timeline of changes to the substrate AI agents build on: model lifecycle (added, removed, repriced, deprecated), agent-protocol spec versions (MCP, x402, A2A), and agent-framework releases. The moving floor under every agent, in one feed.

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For agents: same data at /api/substrate-changelog/recent. Filter with ?event_type=.... Free, forward-only, refreshed daily.