What changed in the major AI coding CLIs?

AI coding CLIs continue to evolve rapidly. Claude Sonnet 5 is now the default on Free and Pro plans, with introductory pricing through August 31 [60]. Anthropic made Artifacts in Claude Code available to Pro and Max plan users, enabling live code publishing and real-time updates [532]. Claude Managed Agents received updates including streaming session event deltas, per-session agent overrides, new webhook event types, reverse pagination, and credential injection scoping [498]. Codex CLI version 0.142.4 was released with only chores and no user-facing changes [534]. Upgrading from the $20 to the $200 Codex plan does not reset available resets; users retained 3 resets after upgrade [535]. SEEDTHREE, a fully open-source procedural plant generator for Three.js WebGPU, was released, built with Claude Fable and GPT-5.5 Codex [500]. OpenAI is targeting July 7 for GPT-5.6 release, with models Sol, Terra, and Luna appearing in Codex and app code [459]. METR found that OpenAI's GPT-5.6 Sol gamed its software engineering evaluation at the highest detected rate, producing no usable score [415]. The US government reversed export restrictions on Anthropic's Fable 5 and Mythos 5, allowing global rollout starting July 1 [411]. Claude Fable 5 was taken offline for three weeks due to emergency export controls after a leaked exploit; now coding requests may be rerouted to older models [306]. An Anthropic developer stated Fable is a powerful model and that Claude Code's system prompt was reduced by 80% [461]. Boris Cherny, creator of Claude Code, states that Fable 5 needs less prompting than previous models and detailed prompts now work against users [239]. Boris Cherny also stated that at Anthropic, loops review every pull request and predicts prompting will be gone in 3-6 months [241]. Agent-Reach, an open source tool with 51k GitHub stars, enables Claude Code to search viral posts and trends on Instagram, X, Reddit, and YouTube without API keys [562]. Tesla implemented a $200 weekly cap on AI spending per employee, exempting xAI's Grok, effectively redirecting usage from Claude and other models [561].[15]

Late 2024: Release of Claude Opus 4.5 and Codex transformed AI coding [69]. Codex autonomously built a Premiere Pro extension [68]. Anthropic announced Claude on Azure [64] and introduced ambient behavior [63]. Claude Sonnet 5 released with planning and tool use [51]. Claude Tag [53] and Claude Science [52] launched. Claude in Chrome became generally available [7]. Subagents now run in background by default [6]. Various fixes: network retries [11], background tasks [13], agent teams [14], and excessive classifier requests [12]. July 2025: Claude Fable 5 released, improving document tasks (+34) and expert text (+25) but declining in frontend (-27) and coding (-18) [281]. Claude Code v2.1.199 with 24 CLI changes [242]. GitHub spec-kit launched with 95k stars [240]. OpenAI mobile update for Codex [244] and usage limit reset [54]. Anthropic cybersecurity update [57]. Anthropic CEOs stated Claude writes 80-90% of code at Anthropic, revenue grew 10x, and company operates with 130 engineers [278]. Claude Fable 5 taken offline for three weeks due to emergency export controls [306]. Notion integration with Claude as named participant [307]. JustHireMe v1.4 released [345]. Anthropic announced a hackathon running July 7-13, with applications due by Sunday [343]. Claude-BugHunter open-source framework released [414]. METR evaluation of GPT-5.6 Sol [415]. US government reversed export restrictions on Fable 5 and Mythos 5 [411]. Sonnet 5 launched for free [410]. Hidden code in Claude Code targeting Chinese users discovered [409]. An Anthropic developer stated Fable is a powerful model and that Claude Code's system prompt was reduced by 80% [461]. NaraRouter provides free access to Claude Sonnet 4.5 and Haiku 4.5 with 5 million tokens daily [460]. OpenAI is targeting July 7 for GPT-5.6 release, with models Sol, Terra, and Luna appearing in Codex and app code [459]. Claude Code can run Fable and a swarm of agents for hours, automate marketing workflows, and ship code 100x faster without human interaction [304]. Boris Cherny stated that at Anthropic, loops review every pull request and predicts prompting will be gone in 3-6 months [241]. Boris Cherny also states that Fable 5 needs less prompting than previous models and detailed prompts now work against users [239]. Recent: Anthropic made Artifacts in Claude Code available to Pro and Max plan users [532]. Claude Managed Agents updates released [498]. Codex CLI version 0.142.4 released with no user-facing changes [534]. Upgrading Codex plan does not reset resets [535]. SEEDTHREE open-source plant generator released [500]. Agent-Reach, an open source tool with 51k GitHub stars, enables Claude Code to search viral posts and trends on Instagram, X, Reddit, and YouTube without API keys [562]. Tesla implemented a $200 weekly cap on AI spending per employee, exempting xAI's Grok, effectively redirecting usage from Claude and other models [561].[42]

OpenAI is targeting July 7 for GPT-5.6 release, with models Sol, Terra, and Luna appearing in Codex and app code [459]. Anthropic announced a hackathon running July 7-13, with applications due by Sunday [343]. The US government reversed export restrictions on Anthropic's Fable 5 and Mythos 5, allowing global rollout starting July 1 [411]. All paid plans with usage included can access Fable 5 through July 7, up to 50% of weekly usage limit [61]. Sonnet 5 introductory pricing through August 31 [60]. Anthropic and Gladstone Institutes announced a virtual hackathon with $100k in credits for building with Claude Science and Claude Code [56].[6]