Prism StudiosModel Leaderboard
Live · data checked Oct 18, 2026, 6:10 AM ET

October 2026 · Language

The best AI language models right now

Best overall

Claude Opus 5.5

Anthropic

Top of the Artificial Analysis Intelligence Index, and it is the model that builds and runs our work every day.

Our testNone in 90 daysarena + creatorsBenchmark#1 of 88Intelligence Index, as Claude Opus 5.5 (Max, Default Fallback)Cost$4.00 in / $20.00 out per 1M tokensAnthropic page
Why it won, with the evidence

Best value

Claude Sonnet 5.5

#2 on the intelligence index · $2.00 in / $10.00 out per 1M tokens (price listed by Artificial Analysis)

56 vs 57.6 for #1, within 5%.

The rule: the cheapest model scoring within 5% of the #1 model. A formula, not an opinion, so no one can buy their way onto it.

Best for the job

If you needUseEvidenceWhat to know
Building, coding and agent workClaude Opus 5.5Arena and our useOur main operator.
The same work at half the priceClaude Sonnet 5.5Arena and our useNumber 2 on the index at half of Opus's price.
Always-on bots at volumeGemini 3.8 FlashArena and our useOur automated bots run on Gemini Flash because of cost. The listed price doubles on January 1, 2027.

The public arenas this week

Intelligence Index · A combined score from many reasoning, coding and knowledge tests. Not a vote. Top 10 · Artificial Analysis · read Oct 18, 2026, 6:10 AM ETScore out of 100 from Artificial Analysis's test suite. Pink is our best overall pick. Linked names have their own evidence page.
  1. 1 Claude Opus 5.5Anthropic 57.6$4.00 in / $20.00 out per 1M tokens
  2. 2 Claude Sonnet 5.5Anthropic 56$2.00 in / $10.00 out per 1M tokens
  3. 3 Muse Wonder FullMeta 55.8no price listed
  4. 4 Claude Fable 5.1Anthropic 53.4$10.00 in / $50.00 out per 1M tokens
  5. 5 GPT-6 AstraOpenAI 52.7$10.00 in / $50.00 out per 1M tokens
  6. 6 Gemini 4 ArgonGoogle 52.6$2.00 in / $10.00 out per 1M tokens
  7. 7 Muse WonderMeta 52.4$4.00 in / $20.00 out per 1M tokens
  8. 8 GPT-6.1 SolOpenAI 51.8$2.00 in / $10.00 out per 1M tokens
  9. 9 Muse Spark 1.3Meta 48.1$1.25 in / $4.25 out per 1M tokens
  10. 10 Grok 4.7SpaceXAI 46.4$2.00 in / $6.00 out per 1M tokens