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Field notes.

Issue 51 · July 2026Prompt engineering, quietly

Writing about the craft of prompting, the shape of agents, and the small engineering decisions that make models useful in real work.

№ 01 · Featuredai tools8 min read

Gemini 3.1 Pro vs Opus 4.7 Reasoning

Discover why Gemini 3.1 Pro still leads Opus 4.7 on GPQA Diamond and what the 94.3% score really says about pure reasoning. Read the full guide.

RephraseMay 27, 2026Read the essay →
Recently  ·  July 2026
  1. № 02

    When Gemini 3.1 Pro Thinking Pays Off

    Learn how to judge when Gemini 3.1 Pro's deeper thinking is worth the latency hit, with practical rules for teams and real prompt examples. Try free.

    prompt tips
    RephraseMay 26, 2026  ·  8 min read
  2. № 03

    Why Claude 3 Opus Got a Substack

    Discover why Anthropic gave Claude 3 Opus a Substack after retirement, and what it signals about AI brands, nostalgia, and trust. Read on.

    ai news
    RephraseMay 26, 2026  ·  7 min read
  3. № 04

    Why the Mythos Mercor Breach Matters

    Discover how the Mythos Mercor breach exposed weak AI access controls, why Discord became the gap, and what teams should fix now. Read more.

    ai news
    RephraseMay 26, 2026  ·  8 min read
  4. № 05

    Claude Opus 4.7 Vision for Documents

    Learn how Claude Opus 4.7 Vision improves document workflows with higher image resolution, sharper extraction, and smarter review. See examples inside.

    ai tools
    RephraseMay 26, 2026  ·  8 min read
  5. № 06

    How Planning Verification Changes Agents

    Learn how planning-phase self-verification changes agent architecture, memory, and control loops in Claude-style systems. Read the full guide.

    prompt engineering
    RephraseMay 26, 2026  ·  8 min read
  6. № 07

    Why Codex Was Told Not to Mention Goblins

    Discover why the Codex system prompt leak matters, what the goblin rule signals about AI control, and how hidden prompts really work. Read on.

    prompt engineering
    RephraseMay 5, 2026  ·  7 min read
  7. № 08

    GPT-5.5 Models: Which One Should You Use?

    Learn how to choose GPT-5.5 Instant, Pro, or Thinking with a simple decision matrix for speed, cost, and complexity. See examples inside.

    ai tools
    RephraseMay 5, 2026  ·  7 min read
  8. № 09

    Why GPT-5.5 Codex Uses Fewer Tokens

    Discover why GPT-5.5 Codex token efficiency matters more than raw pricing, and how fewer tokens can lower real coding costs. Read the full guide.

    prompt engineering
    RephraseMay 25, 2026  ·  7 min read
  9. № 10

    How Moonshot Kimi Reached GPT-5.5 Level

    Discover how Moonshot pushed Kimi from top open-source to GPT-5.5-level performance in 18 months, and what that means for AI teams. Read on.

    ai tools
    RephraseMay 25, 2026  ·  7 min read
  10. № 11

    Why DeepSeek Model Aliases Can Bite You

    Learn how to choose between deepseek-chat aliases and explicit V4 models before July deprecation hits production. Read the full guide.

    ai tools
    RephraseMay 26, 2026  ·  7 min read
  11. № 12

    Why DeepSeek V4 Flash Is So Cheap

    Discover why DeepSeek V4 Flash costs 25x less than Pro yet gives up just 1.6 SWE-Bench points. Learn the tradeoffs and when to use it. Try free.

    ai tools
    RephraseMay 24, 2026  ·  7 min read
Page 8 of 51
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