Frontier AI research labs and model providers, side by side.
OpenAI introduced GPT-6 Sol and Luna with aggressive token pricing and a prompt-caching overhaul, while Anthropic launched Claude Opus 5.5 as the first model of a new Claude 5.5 family — and made it the default Opus across Claude Code and the Claude API.
The OpenAI Go SDK added organization Decisions usage reporting and a new named Live voice, alongside shared OCI external-storage response types.
The OpenAI Python SDK gained vault updates, metadata filtering, a new billing_not_active session error code, and the shida named Live voice, alongside aligned beta pagination limits.
A quiet day for the frontier labs, with Claude's release limited to bug fixes and general experience improvements.
Squashed some bugs and improved the overall experience. Yours, Claude
OpenAI's SDKs gained prewarmed hosted environments plus agent environment suspension and expiration, while Claude Code hardened managed-hook enforcement and stopped non-UTF-8 edits from corrupting files.
Managed-settings PreToolUse and prompt hooks that block a tool call now refuse it and end the turn, and Edit and NotebookEdit no longer replace every non-ASCII character in files that are not valid UTF-8 — such edits are refused instead. Adds a code key to the Claude apps gateway's managed.policies[], autoCompactWindow for subagents, CLAUDE_CODE_WORKFLOW_SUBAGENT_MODEL, an allow_large option for the Read tool, plus a long list of fixes across MCP servers, plugins, self-hosted runners, cloud sessions, and Windows.
Anthropic launched Claude Dashboards and Claude Motion in beta while graduating Claude Docs, Slides, and Design to general availability, and Claude Code tightened hook failure and model-routing controls alongside a prompt-hook fix that let blocked commands through.
Claude Managed Agents can now use dynamic workflows in beta via the managed-agents-2026-04-01 header, where the agent writes a workflow program that runs many agents in phases and combines results while the server runs it in the background. Enable with multiagent: {"type": "multiagent_20261001", "workflows": {"type": "enabled"}} and follow runs via workflow_run.* events on the session event stream.
Command and HTTP hooks support onFailure: "block" so a hook that fails to start, times out, or exits unexpectedly blocks the action instead of allowing it, and Claude apps gateway upstreams now accept an optional models list that limits which models are sent there, including on failover. Also fixed context-1m beta rejection breaking all requests on [1m] models, remote MCP reconnects looping against servers that drop connections, and claude -p text output dropping earlier responses when background work started another turn.
Squashed some bugs and improved the overall experience. Yours, Claude
Claude Dashboards builds dashboards that update as connected data changes, in beta on all paid plans, and Claude Motion turns reports or charts into animated explainers written as code and exportable as MP4, in beta on Team and Enterprise. Claude Docs, Claude Slides, and Claude Design are out of beta on every plan including Free.
ChatGPT Atlas has been retired and no longer receives updates. Bookmarks, open tabs, browsing history, cookies, and signed-in sessions do not transfer automatically, so users must import previously exported bookmarks HTML files and sign in to sites again in a new browser. ChatGPT conversations remain available separately, subject to plan and workspace settings.
Composer predictions, in beta for personal ChatGPT Pro users aged 18+ in the latest Codex desktop app, suggest a next message based on the current thread; press Tab to accept and review or edit before sending, and predictions do not auto-send. Predictions are on by default and can be turned off via Show predictions in the Composer section of General settings; generating them does not count toward usage limits or credits, while sent messages follow normal billing.
Fixed a TUI crash when asynchronous questions contain multiple lines, now preserving line breaks and complete hyperlink destinations. Startup failures caused by feature-setting differences between a running background server and CLI defaults are also fixed, with compatibility checks now applying only to explicit command-line feature overrides.
OpenAI
Anthropic