AI discovery: 2026/06
01.06.2026 – 30.06.2026
Product
- Anthropic releases Claude Fable 5 for general use and Claude Mythos 5 for Project Glasswing partners on June 9, both priced at $10 / $50 per million input / output tokens
- Claude Sonnet 5 launches on June 30 with a 1M token context window, $2 / $10 per million tokens introductory pricing and adaptive thinking on by default
- OpenAI adds role-specific plugins, Sites and annotations to Codex for knowledge work and reports more than 5 million weekly Codex users
- Anthropic introduces Claude Tag, a beta for Team and Enterprise customers where Claude joins Slack channels and takes delegated tasks
- GitHub launches the Copilot desktop app in technical preview at Build 2026, and the Copilot SDK reaches general availability in six languages
UX/UI
- GitHub Copilot CLI’s redesigned terminal interface is generally available, with tabs for issues, pull requests and gists and in-session MCP setup
- Copilot becomes a selectable agent in the JetBrains AI Assistant agent picker, with model choice and reasoning depth controls
- Devin Desktop is listed on Product Hunt as one surface for managing fleets of local and cloud agents
Engineering
- Claude Sonnet 5 is generally available in GitHub Copilot for Pro, Pro+, Max, Business and Enterprise, billed at provider list pricing
- Microsoft’s in-house MAI-Code-1-Flash model becomes generally available for Copilot Business and Enterprise once admins enable the policy
- Cursor 3.8 focuses on Automations: a /automate skill, a Slack emoji trigger, five new GitHub triggers and a default-on computer use tool
- Codex adds a browser Developer mode with Chrome DevTools Protocol access to inspect network, console and page state, and browser use is up to twice as fast
- Google says consumer Gemini CLI and Gemini Code Assist for GitHub shut down on June 18, with Antigravity CLI as the replacement and no 1:1 feature parity
DevOps
- GitHub Actions issues read-only cache tokens to untrusted triggers such as pull_request_target to stop cache poisoning of the default branch
- Microsoft announces MXC at Build, an OS-level sandbox for AI agents on Windows with kernel-enforced access policy, in early preview
- GitHub opens a public preview of open source license compliance, enforced through a merge ruleset on top of the dependency review action
- GitHub adds per-user AI credit budgets for cost centers, creatable through the REST API for now
- Anthropic disables Fable 5 and Mythos 5 for all customers on June 12 to comply with a US export directive, a reminder that a model can disappear mid-project
Infosec
- Wiz traces the Miasma npm attack: at least 32 package releases in the @redhat-cloud-services namespace were published with valid SLSA provenance after a compromised employee account
- StepSecurity reports that on June 17 more than 140 @mastra npm packages were republished with a typosquatted easy-day-js dependency that runs a postinstall script
- OpenAI launches Patch the Planet with Trail of Bits, HackerOne and Calif, using Codex Security and GPT-5.5-Cyber with human review of every finding to help open source maintainers
- OpenAI adds Lockdown Mode to ChatGPT, which limits outbound requests to block data exfiltration after a prompt injection
Tricks & Tips
- Simon Willison runs untrusted Python in a MicroPython-on-WebAssembly sandbox with wasmtime memory limits and fuel-based CPU limits, and flags it as unproven
- Simon Willison’s first notes on Fable 5 cover its speed and cost, safeguards that trigger often, and an API option to route refused requests to another model
- Uber reportedly caps token spending at $1,500 per month per AI coding tool, and Willison works out what that means for his own usage
Reddit & Twitter
- Andrej Karpathy says on X that Jevons paradox is raising his demand for software as it gets cheap, in a comment on Fable 5, quoted by Simon Willison
- Latent Space’s recap of r/LocalLlama threads on GLM-5.2 shows praise for closing the gap to closed models and doubts about running it locally, since the 2-bit GGUF is 238GB
- Slashdot commenters split on Ladybird dropping public pull requests, from maintainer overload to calls for careful review instead
OSS
- Z.ai releases GLM-5.2 under the MIT license with 1M token context and a reported 62.1 on SWE-bench Pro
- JetBrains releases Mellum2 under Apache 2.0, a 12B mixture-of-experts coding model with 2.5B active parameters
- Ladybird stops accepting public pull requests on June 5, saying AI makes a large patch a weaker signal of good faith
- Daytona moves its production codebase to closed source, arguing that AI-driven vulnerability scanning makes publishing its isolation layer a risk