Frontier AI research labs and model providers, side by side.
Anthropic turned Claude Projects from a folder of chats into a single multi-threaded conversation that runs in the cloud, while Claude Code, Codex CLI, and OpenAI's SDKs all landed substantial feature releases the same week.
OpenAI launched the GPT-6 Sol and Luna models with revamped prompt caching while Anthropic's Claude Opus 5.5 became the default Opus model, bringing Fable 5.1-level intelligence and 1M context.
GPT-6 Sol and GPT-6 Luna are now selectable from the model picker, and the rate-limit switch prompt now recommends GPT-6 Luna. Added both models to the model catalog.
GPT-6 improves prompt caching with higher cache hit rates, new diagnostics, explicit breakpoints, and controls that reduce latency and costs.
OpenAI introduces GPT-6 Sol and Luna, two models bringing frontier intelligence to everyday work with different balances of capability and cost.
Claude Opus 5.5 (claude-opus-5-5) is now the default Opus model with 1M context and $4/$20 per Mtok pricing. Writes through a symlinked path are now judged by where they land, so acceptEdits, allow rules and auto mode no longer approve a write landing outside the tree, plus a long tail of fixes across dialogs, auto mode retries, and background subagents.
Claude Opus 5.5 performs at the level of Claude Fable 5.1 for most tasks, writes more clearly by putting the most important information first, and is faster and more efficient than Opus 5. It is available everywhere today, with raised usage limits on Pro, Max, and Team plans.
OpenAI's Python, Node, and Go SDKs gained external storage configuration, safety case retrieval and warning webhooks, session environment reset events, and a fix preserving legacy model choices across languages.
Anthropic
Codex/tui for your next launch, including transcript search, mouse selection, and right-click co...GPT-6 Sol and GPT-6 Luna are rolling out to Codex and ChatGPT Work at lower token prices than GPT-5.6, with Sol for complex coding and agentic workflows and Luna for high-volume tasks. Both reach Plus, Pro, Business, Enterprise, and Edu users, and Enterprise administrators must enable the models.
The OpenAI Go SDK expands platform integration with environment-variable vault credentials, external storage configuration, safety case retrieval, and safety and call-handling webhook events, alongside an Azure gateway path fix.
Plus and Pro users in the U.S. can now connect an Experian credit report and VantageScore 3.0 score in ChatGPT to track their credit score, with monthly report updates and credit monitoring alerts for new inquiries, accounts, or addresses. The Experian connection is separate from bank accounts and does not require linking through Plaid, and the feature is rolling out on web, iOS, and Android.
Privacy Center is rolling out to signed-in ChatGPT Free, Go, Plus, and Pro users, gathering information about chat privacy, memory, personalization, data use, connected apps, and account security with links to the settings that manage them. It is reachable on web via the account menu under Help and on mobile via Settings, with privacy controls remaining in ChatGPT Settings.