GPT-5

I complained to Anthropic over expired paid API credits and 31-day limits

@AnthropicAI:As a preliminary matter, I state the following clearly: - I do not intend to accept any refund, compensation, reissued credits, account adjustment, or any other form of individualized relief. - Nor do I intend to accept any settlement arrangement that would substitute private handling for a public apology, amendment of the relevant terms, and repair of the billing mechanism. - The sole purpose of this complaint is to require Anthropic to provide a formal response to the unfair term

Show HN: I generated 235 system docs in a day using GPT-5.5

I generated 235 system documentation pages for a startup in about 8 hours using GPT-5.5 in Codex.We've been putting off the chore of writing technical docs since our team could handle all customer questions directly. However, since releasing an AI tool in the system, users have started asking it system questions as opposed to just data questions like it was designed for. It couldn't answer how-to questions, so, users got confused.We didn't have a direct way to teach the Ai about o

New Fable 5 Is a "Mythos-Class" LLM Available to All, Anthropic Announces

Anthropic unveils Claude Mythos 5 and Fable 5, a restricted-access frontier AI model and guardrailed version for everyone to ...

Anthropic releases state-of-the-art AI model Claude Fable 5, and it's safe to use

Anthropic has unveiled Claude Fable 5, the company's most capable model to date, with performance described as 'exceptional' in software engineering.

Anthropic’s Claude Fable is a version of Mythos the public can access today

Anthropic is releasing Claude Fable 5, its first Mythos-class model available to the public. The model comes with guardrails ...

Anthropic, which claimed AI model was too risky for public to use, releases ‘safe’ version

After hyping potential safety threats posed by its latest AI model, Anthropic says it is releasing a version with tweaks that ...

Anthropic Launches Mythos With Six Features You Absolutely Need

Anthropic launches Mythos with Fable 5. Six capabilities for agents: 80.3% code reasoning, extended thinking, autonomy. Vision, science acceleration, enterprise pricing

Anthropic releases Fable 5 model, built on the same tech that spooked the government

Anthropic released its latest model Tuesday afternoon, heralding the public’s first access to the AI company’s most powerful ...

What smart people are saying about the 2 most controversial parts of Anthropic's new models

Anthropic says Mythos won't help users build competing AI models. Critics said the move quietly degrades responses and limits competition.

Anthropic Claude Fable 5: Why does the new Mythos-class AI model flag simple biology questions about cancer & mitochondria? Here's what we know

India, June 10 -- Artificial intelligence company Anthropic has introduced Claude Fable 5, a new AI system that the company ...

Why Anthropic's 'safe' Mythos-class model won't answer questions about cancer

The broad safeguards built into Anthropic's Claude Fable 5, a Mythos-class AI model, blocks some mundane requests on cybersecurity and biology.

Show HN: Sandbox AI-app lifecycle, from build to run

Hi HN,This is a project I've been working on since the beginning of 2025 full time, without funding.Coding agents have fundamentally changed the way we write software. When you let an agent write code, pull dependencies, and run scripts, you are delegating trust while still keeping the responsibility. You shouldn't have to choose between moving fast with agents and maintaining basic control over your host machine.Normally, we just inspect the final result, treating the app like a black

DeepSWE blows up the AI coding leaderboard, crowns GPT-5.5, and finds Claude Opus exploiting a benchmark loophole

DeepSWE puts GPT-5.5 atop the AI coding leaderboard while raising new questions about Claude Opus, SWE-Bench Pro, and ...

Ask HN: Feeling FOMO re: SpaceX, Anthropic, OpenAI IPOs and the future of tech

What&#x27;s the future of tech going to be like? Will there even be a point in doing startups when people can just buy out companies for billions of dollars or raise like 100m plus early rounds? It feels like the numbers just went up up up and away and there is now like an infinite amount of money somehow.<p>Has there even been a time like this in the past?

Show HN: Built an open-source local firewall for AI coding agents

GitHub: https:&#x2F;&#x2F;github.com&#x2F;ashp15205&#x2F;guardian-runtimeDocs: https:&#x2F;&#x2F;ashp15205.github.io&#x2F;guardian-runtime&#x2F;Hi Guys,I built Guardian Runtime: a local FinOps and security proxy for AI coding agents (like Claude Code, Cursor, and Aider).You point your agent to localhost:8080 instead of the real LLM API, and it sits in the middle to do three things:1. Hard Budgets: Auto-kills the agent&#x27;s internet access if it gets stuck in a retry loop and hits your daily sp

Client Accidentally Burns $500 Million on Claude AI in One Month: Here’s How

A company accidentally spent 500 million dollars on Claude AI in one month after failing to set spending limits.

OpenAI Codex Agents In Action From Data to Decision

© 2026 Schmidt Special Competitive Studies Project, LLC. Licensed under CC BY-NC 4.0 (non-commercial use with attribution). To view a copy of this license, visit https://creativecommons.org/licenses/by-nc/4.0/

Show HN: MCP for the ChatGPT Ads API – Query ChatGPT Ads from Claude and Codex

I built a small MCP server for the ChatGPT Ads advertiser API, which OpenAI opened to the public a couple of weeks ago.It&#x27;s read-only for now: accounts, campaigns, ad groups, ads and insights (11 tools in total). You can query campaigns from Claude, Codex, Cursor and so on in plain language. Writes (&quot;actions&quot;) are next; I have two ideas here: - wrap them in a deterministic tool (json in&#x2F;out) - add a human in the loop (maybe even a verification&#x2F;consistency check step bet

Show HN: Cost.dev (YC W21) – making agents cost-aware and cheaper to call

We launched Infracost on HN five years ago (https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=26064588) where our CLI generated cost estimates for infra-as-code, e.g. &quot;this Terraform PR adds $400&#x2F;mo&quot;. The idea was to shift cloud costs (FinOps) left, so engineers get visibility of costs before deployment and make better decisions.Earlier this year we started seeing agent traffic in our logs and it looked like coding agents were calling our CLI. But that CLI wasn&#x27;t designed w

OpenAI is retiring GPT-4.5 from ChatGPT on June 27, clearing the deck as Microsoft and Google push their own coding models

Developers who rely on GPT-4.5 inside ChatGPT will lose access to the model on June 27, as OpenAI phases out one of its ...