From c08c2d6fcb7ab10f377669f7b25d6cb7d33d033d Mon Sep 17 00:00:00 2001 From: Florian BRUNIAUX Date: Wed, 18 Feb 2026 10:47:47 +0100 Subject: [PATCH] docs: update CHANGELOG 3.27.6 with post-release fixes and community findings Co-Authored-By: Claude Sonnet 4.6 --- CHANGELOG.md | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/CHANGELOG.md b/CHANGELOG.md index 7b5cf55..f0e106e 100644 --- a/CHANGELOG.md +++ b/CHANGELOG.md @@ -7,7 +7,9 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/). ## [3.27.6] - 2026-02-18 ### Added -- New subsection "200K vs 1M Context: Performance, Cost & Use Cases" in pricing section (MRCR benchmark table, cost-per-session table, decision guide, key facts) +- New subsection "200K vs 1M Context: Performance, Cost & Use Cases" with MRCR benchmark table, cost-per-session table, decision guide, and key facts +- Community findings from Reddit/HN/blogs: Gemini comparison, "70% context → new session" workaround, real-world use case limits +- HN community validation reference: Opus 4.6 retrieves 49/50 spells across ~733K tokens (Harry Potter test) - `machine-readable/reference.yaml`: 5 new entries for Sonnet 4.6 + context window comparison ### Changed @@ -16,6 +18,14 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/). - `threat-db.yaml` v2.1.0: added CVE-2026-23744 (MCPJam RCE), hightower6eu publisher (314+ malicious skills), Slopsquatting technique T009, Mcpwn scanner, OWASP Agentic AI Top 10 2026, new sources (VirusTotal, SentinelOne, Immersive Labs, arXiv) - `cheatsheet.pdf`: updated binary +### Fixed +- Beta header corrected: `interleaved-thinking-2025-05-14` → `context-1m-2025-08-07` (different feature, deprecated on Opus 4.6) +- Sonnet 4.6 long-context pricing: added premium tier ($3→$6 / $15→$22.50 above 200K — applies to all models) +- Cost estimates recalculated: Sonnet 4.6 @ 1M ~$4.13 (was $2.25), Opus 4.6 @ 1M ~$6.88 (was $8.75) +- Restored Opus 4.6 MRCR 93% @ 256K with confirmed source (independent analysis of Anthropic data) +- Added usage tier 4 requirement (1M context not available on tiers 1–3) +- Clarified premium pricing applies to all tokens in request once input exceeds 200K (not just excess) + ## [3.27.5] - 2026-02-17 ### Documentation