SpaceXAI launched Grok 4.5 on Wednesday at $2/$6 per million tokens, with Elon Musk calling it “Opus-class” but cheaper and faster than Anthropic’s models.

OpenAI made GPT-5.6 generally available Thursday in three tiers, with its cheapest Luna variant matching Grok 4.5’s output price at $6 per million tokens.

Meta debuted Muse Spark 1.1, its first paid AI model, at $1.25/$4.25 per million tokens — the lowest price among the three flagship releases.