AI Daily Dev — April 28, 2026

DeepSeek Slashes V4-Pro 75% and Drops Cache-Hit Pricing 10× Across Every Model

Promo cuts V4-Pro input to ~$0.036/M tokens (vs $0.145 list) through May 5; output unchanged at $3.48/M.
Input cache-hit price dropped to 1/10 of launch across the entire DeepSeek API — applies to V4-Pro, V4-Flash, and V3 models, effective immediately.
Move undercuts GPT-5.5 ($5/$30) and Claude by an order of magnitude — explicit pressure on Western frontier API pricing.
r/LocalLLaMA threads: 52% of 85 V4-Pro users surveyed say it's ready to replace their primary coding model; HN front-page discussion April 27.

industry deepseek.com

One-week internal Craigslist where every buy, sell, and bid was executed by a Claude agent — 186 deals closed, ~$4,000 in real value.
Four parallel marketplaces compared Opus 4.5 vs Haiku 4.5 — same lab-grown ruby sold for $65 with Opus, $35 with Haiku.
Aggressive-negotiation prompts had no statistically significant effect; model strength was the dominant variable, and weaker-model users didn't notice they'd lost.
46% of participants said they'd pay for the service; widely shared on HN and X April 25–27 as the first published agent-on-agent commerce study.

research anthropic.com

Claude Cowork desktop (projects, artifacts, memory, MCP, plugins) now runs through customers' own AWS accounts via Bedrock — no Anthropic-side prompt or file storage.
Anthropic confirms Claude is now trained and served on 1M+ Trainium2 chips, co-engineering with Annapurna Labs at the silicon level.
Trainium2 + Trainium3 capacity reaches ~1 GW by end of 2026; remaining ~4 GW of the $100B/5 GW envelope rolls out 2027–2029.
AWS Weekly Roundup April 27 frames this as the deepest model–chip co-design partnership of any frontier lab to date.

industry aws.amazon.com

New principles essay April 26: Democratization, Empowerment, Universal Prosperity, Resilience, Adaptability.
Frames AGI as 'dwarfing' steam engines and electricity, commits OpenAI to 'err on the side of caution' until safety evidence accrues.
Published roughly 12 hours before jury selection in Musk v. OpenAI ($134B), drawing pointed coverage on the timing from TechRadar, Eweek, and the-decoder.
Companion post April 27 names the first 208 People-First AI Fund grantees — $40.5M of the announced $50M deployed.

industry openai.com

Internal preview spotted in Claude Code's side nav — pick a repo, Claude hunts for general bugs and proposes fixes across the codebase.
Built on the same multi-agent fleet pattern as the production Code Review feature: parallel agents each look for a different class of issue.
UI warns the feature 'consumes tokens at a high rate' and suggests starting with small repos; not yet in production builds, no GA date.
Sits alongside the already-shipped Security tab for Enterprise customers, which targets vulnerabilities specifically.

tools testingcatalog.com