Friday Jul 10
PRODUCTxAI

Grok 4.5 Launches At A Steep Discount

10JUL
GROK 4.5PRICE CUT

xAI just started a frontier-model price war. Grok 4.5 prices in more than 60% below Opus 4.8 and GPT-5.5. It's the first xAI model trained on real Cursor coding sessions.

xAI shipped Grok 4.5 on July 8. It's built for exactly one job: coding and agent work.

Cache hits cut input cost to 50 cents per million tokens. The context window shrank to 500,000 tokens, down from 1 million. It still ranks fourth on the Artificial Analysis Intelligence Index, above every open model.

Musk called it Opus-class the day it shipped. Cheap and fast is the new baseline now, not a selling point.

full brief & sources

⚡ Why this matters

  • Frontier models are converging on capability, so price and specialization are becoming the real battleground.
  • Training a flagship model on real coding-tool session data, not just scraped code, is a new recipe.

🔍 What happened

  • xAI released Grok 4.5 on July 8, its first model built specifically for coding and agentic tasks.
  • API pricing: $2 per million input tokens, $6 per million output tokens; cached input drops to $0.50.
  • That's over 60% cheaper than Anthropic's Opus 4.8 and OpenAI's GPT-5.5.
  • Grok 4.5 trained partly on real Cursor developer session data, not synthetic benchmarks.
  • It ranks fourth on the Artificial Analysis Intelligence Index, above all open-weight and Gemini models.
  • Context window is 500k tokens, down from Grok 4.3's 1 million; not yet available in the EU.

💬 Smart takes

  • Elon Musk: called Grok 4.5 "Opus-class" on launch.
  • Axios: framed the release as a scoop on xAI's push into developer tools.
  • Skeptic: a shrunk context window, 500k tokens down from 1 million, is a real regression dressed up as a pricing win.

🧭 Where this goes

  1. LikelyAnthropic and OpenAI respond with cheaper, task-specific coding tiers within weeks.
  2. LikelyCursor session data becomes a contested resource other labs try to license or replicate.
  3. PossiblexAI's EU delay becomes a pattern as it prioritizes US enterprise deals first.
  4. Wild CardGrok 4.5's price undercut is steep enough that it becomes the default model inside Cursor itself.

🥄 The Spoon Take

Model quality is converging, so price just became the weapon. xAI trained on the exact coding sessions rivals want, then priced it to force a reaction. Watch what Anthropic and OpenAI do to their coding tiers in the next month, that's the real scoreboard.

🤔 Pushback

A shrunk context window and no EU access are real limits; cheap and fast doesn't help if the job needs long context or lands outside the US.

·x.ai - Introducing Grok 4.5·Axios - Grok 4.5 scoop·Kingy.ai - Grok 4.5 benchmarks