Back to News

Artificial Analysis ranks Sonnet 5.5 (max) #2 in Intelligence Index, highest token use

#ai-benchmarks#intelligence-index#sonnet-5.5#token-usage

Artificial Analysis' Intelligence Index places Sonnet 5.5 (max) above GPT-6 Astra (max) and behind only Opus 5.5 (max), with the highest token use among them. With max effort, Sonnet 5.5 gains 18 points over Sonnet 5, moving to #2 on the index.

Coverage timeline

  1. Techmeme
    Artificial Analysis' Intelligence Index: Sonnet 5.5 (max) ranks above GPT-6 Astra (max) and behind only Opus 5.5 (max) but has the highest token use of them all (Artificial Analysis)

    Artificial Analysis : Artificial Analysis' Intelligence Index: Sonnet 5.5 (max) ranks above GPT-6 Astra (max) and behind only Opus 5.5 (max) but has the highest token use of them all — With max effort, Sonnet 5.5 gains 18 points over Sonnet 5 and moves to #2 on the Intelligence Index, behind only Opus 5.5 (max).

Related stories

  • Artificial Analysis: Gemini 4 Argon matches GPT-6 Astra on intelligence, cuts hallucination to 15%

    Artificial Analysis reported that Google's Gemini 4 Argon (high) matches GPT-6 Astra (max) on its Intelligence Index, with a 15% hallucination rate versus 51% for Astra. The model also costs 60% of Astra's per-task price under discounted pricing.

    1 reports · 1 sources

  • Artificial Analysis Coding Agent Index: Fable 5.1 Leads with 70, GPT-6 Astra Scores 67

    Artificial Analysis published a coding agent benchmark index comparing top models. Fable 5.1, running in Claude Code, leads the index with a score of 70, while GPT-6 Astra scored 67, roughly equal to Claude Opus 5, Fable 5, and Muse Spark 1.3. The index notes that various effort levels of the model occupy the Pareto frontier of token efficiency.

    1 reports · 1 sources

  • OpenAI launches GPT-6 Astra, claims world's best computer use model

    OpenAI announced GPT-6 Astra, its next-generation model focused on computer and browser use, claiming it is the world's most intelligent and aligned model. The company stated Astra was built on its largest training run using over 100,000 GPUs at the Stargate facility, and in tests it outperformed humans in tasks like booking DMV appointments and searching job listings. OpenAI president Greg Brockman declared 'Welcome to the AGI era,' though the model's capabilities and limitations are still being assessed by developers.

    23 reports · 9 sources515 points · 162 comments

  • OpenAI rolls out GPT-6 Astra broadly, priced at $10/$50 per million tokens

    OpenAI began rolling out GPT-6 Astra on September 3, 2026, initially to a limited set of organizations and Daybreak cybersecurity platform customers, then expanding to all Pro, Enterprise, and Business Premium users and the API by September 5. The model is priced at $10 per million input tokens and $50 per million output tokens, matching Anthropic's Claude Fable 5.1, and scores 99.9% on ARC-AGI 3 with a custom harness. CEO Sam Altman apologized for the 'messy' initial rollout that locked out some paying users, while the company touted the model as a 'generational leap' and the start of 'the AGI era.'

    4 reports · 4 sources

News updates every hour. Subscribe in your RSS reader to get new stories automatically.

Subscribe