deepseek-ai/DeepSeek-V4-Flash-0731

Simon Willison · 2026-07-31 · 2 min read

DeepSeek released a 304B parameter model that outperforms larger 428B models on intelligence benchmarks while costing only $0.14/million input tokens, making it potentially the best price-to-performance ratio available right now. For engineers building agentic systems or cost-sensitive LLM pipelines, this is worth evaluating as a drop-in via OpenRouter, though you should set reasoning effort to high to get quality results.

Stateless MCP has recaptured my interest (and inspired mcp-explorer and datasette-mcp)

Simon Willison · 2026-07-31 · 7 min read

TLDR: MCP 2.0's shift to stateless HTTP (single request instead of session-based handshake) dramatically simplifies both client and server implementation, making it practical to build and deploy MCP tools quickly. This renewed simplicity also makes MCP more appealing as a safer alternative to giving agents raw shell/curl access — the constrained, auditable tool surface is easier to secure and works with smaller local models. Willison built three working MCP projects in a week to prove the point.

Friday Deploy Freezes Are Exactly Like Murdering Puppies

Charity Majors · 2019-05-01 · 18 min read

TLDR: Friday deploy freezes are a symptom of broken CI/CD pipelines and poor observability — and they actively make things worse by batching changes into harder-to-debug deployments and killing velocity. The real fix is investing in faster, smaller, more frequent deploys, because research consistently shows that deploy speed and stability improve together, not at each other's expense.

On pain, careers, and doing things the hard way.

Charity Majors · 2019-04-30 · 5 min read

TLDR: Leaning into discomfort is a legitimate growth strategy — Majors brute-forced her way through a public speaking phobia by deliberately seeking painful repetitions until it became routine. But there's a critical distinction between acute pain you can work through and chronic pain that erodes your capacity, creativity, and judgment over time. Mistaking the second for the first — as she did grinding through 18 months as a CEO she hated — isn't resilience, it's damage.