Intelligence & cost · updated Oct 8, 2026
Intelligence 165: GPT-6 Astra-class AI
Intelligence 165 first arrived in Sep 2026 with GPT-6 Astra (OpenAI), at $4 per million tokens (Claude Sonnet 5.5, the cheapest option in its first month). Today 4 models from 2 labs reach it. The cheapest, Claude Sonnet 5.5, costs $4: 1× cheaper.
First reached
Sep 2026
GPT-6 Astra, OpenAI · launch price $4
Available today
4 models
from 2 labs · 0 open-weight · 4 have ever reached it
Cheapest today
$4
Claude Sonnet 5.5 · 1× cheaper than at debut
Open-weight lag
not yet
no open-weight model reaches this level yet
| Model | Lab | Weights | ECI | Cheapest $ / M tokens | Via |
|---|---|---|---|---|---|
| Claude Sonnet 5.52026-09 | Anthropic · US | closed | ECI 165.0 | $4 | via AWS Bedrock |
| GPT-6.1 Sol2026-09 | OpenAI · US | closed | ECI 166.1 | $4 | via Microsoft Azure |
| Claude Opus 5.52026-09 | Anthropic · US | closed | ECI 167.3 | $8 | via AWS Bedrock |
| GPT-6 Astra2026-09 | OpenAI · US | closed | ECI 166.4 | $20 | via Microsoft Azure |
Source: A model reaches level 165 when its Epoch Capabilities Index estimate is at or above it. Prices are list prices per million tokens, blended 3:1 input to output. · Epoch Capabilities Index · LiteLLM price map