Timeline
ChatGPT nearing 1 billion weekly active users, 7 months after original internal deadline
Released with 1M token context and 128k output.
Claude quietly removed full thinking traces feature, according to user reports and researcher Ethan Mollick.
Claude Opus 5 released with Fast Mode (2.5x speed) at Opus 4.8 pricing, saving 50% on tokens
Claude Opus 4.8 beats Gemini Pro 5 by 11 points on Fable 5 benchmark
Claude Opus 4.8 achieves 89% task completion and 2.5% harm rate on WorkBench, a dramatic improvement over GPT-4.
Claude Opus 4.8 adds dynamic workflows for agentic coding
OpenAI launched dreaming memory system for ChatGPT that retains user preferences across sessions
OpenAI merged Codex into ChatGPT
ChatGPT market share fell below 50% for first time to 46.4%.
Ecosystem
Claude Opus 4.6
ChatGPT
Benchmarks
Evidence (9 articles)
Claude Opus 4.6's New 'Personality' and How to Code with It Effectively
Mar 17, 2026Claude's Paying Consumer Base Grew 75% Since January, Indagari Data Shows
Jun 25, 2026Square, Cross River Bank, and Stripe Partner to Enable Agentic Commerce Payments
Jul 2, 2026The Text-Crutch Conundrum: How VLMs' Spatial Reasoning Depends on Reading, Not Seeing
Feb 19, 2026Claude Reaches 30M Daily Users; Anthropic Scales
May 22, 2026Boko Haram AI units use ChatGPT, Claude, Gemini for attack planning
Jul 11, 2026Visa Expands Payment Passkeys from Issuer Rollout to AI Agent Commerce
Jul 3, 2026Anthropic Opus 4.7, ChatGPT Image 2 Rumored for Imminent Release
Apr 15, 2026+ 1 more articles