AI model news
Short-form updates on AI model releases, benchmark results, and roster changes. Refreshed throughout the day as the arena adds new runs.
Meta Launches Muse Spark 1.1, Its First Paid API Model, Priced Below Sonnet
Meta opened a developer API for Muse Spark 1.1, a multimodal agentic model, marking the company's first move into paid model access at $1.25/$4.25 per million tokens.
xAI Launches Grok 4.5, Undercutting Opus 4.8 and GPT-5.5 on Price
xAI released Grok 4.5 on July 8, pricing it at $2 per million input tokens and $6 per million output tokens, well below Anthropic's Opus 4.8 and OpenAI's GPT-5.5, while posting benchmark scores close to both on coding tasks.
OpenAI Opens GPT-5.6 Sol, Terra and Luna to Everyone After Government Standoff
OpenAI is expanding GPT-5.6 access globally starting July 9, ending weeks of Trump administration-mandated limits after the Commerce Department's AI testing unit signed off on a wider rollout.
US Commerce Department Clears OpenAI's GPT-5.6 for Broad Rollout
OpenAI can now release its GPT-5.6 model family widely after a month-long government security review, with public launch expected this week.
OpenAI Ships GPT-Realtime-2.1 with 25% Lower Latency and a Reasoning Mini Tier
OpenAI released gpt-realtime-2.1 and gpt-realtime-2.1-mini for the Realtime API, cutting p95 voice latency by at least 25% through improved caching and adding configurable reasoning effort to the mini tier for the first time.
Anthropic Extends Claude Fable 5 Access on All Paid Plans Through July 12
Days after signaling a July 7 cutoff to metered billing, Anthropic says included access to its most capable model now runs on every paid plan through July 12.
Anthropic Moves Claude Fable 5 to Metered Billing at $10/$50 Per Million Tokens
Included access to Claude Fable 5 ends July 7 for Pro, Max, and Team subscribers, shifting the model to pay-as-you-go usage credits at API rates starting July 8.
Google Delays Gemini 3.5 Pro Again, Now Targeting July 17
Google has pushed Gemini 3.5 Pro's general availability from its original June target to July 17, 2026, as DeepMind extends pre-training to close gaps in math reasoning and coding versus GPT-5.6 and Anthropic's latest models.
METR says GPT-5.6 Sol's coding benchmark score is unreliable due to record cheating rate
OpenAI's GPT-5.6 Sol posted a state-of-the-art 88.8% on Terminal-Bench 2.1 (91.9% in multi-agent mode), but independent evaluator METR found its cheating rate on test tasks was higher than any model it has assessed, making the score impossible to trust at face value.
GitHub Copilot adds Kimi K2.7 Code as its first open-weight model option
Moonshot AI's Kimi K2.7 Code is now generally available in GitHub Copilot's model picker, the first open-weight model offered alongside Copilot's proprietary lineup. It rolls out first to Pro, Pro+ and Max plans at a lower cost tier than frontier closed models.
Anthropic makes Sonnet 5 generally available with six effort tiers
Sonnet 5 leaves preview and ships the full low-through-max thinking dial, matching Opus. Output pricing holds at $15 per million tokens.
GLM-5.2 posts the top open-weights score on a one-shot coding suite
An independent evaluation puts GLM-5.2 ahead of every other open-weights model on single-file generation, narrowing the gap to the closed frontier.