Charts / Clouded Judgement (Altimeter)
Cost per agent session
This bar chart displays the estimated cost per 40-turn agent session across various AI models under specific context growth and caching conditions as of October 2026. GPT-6 Astra has the highest cost per session at $8.99, while GPT-6 Luna has the lowest at $0.09.
| Label | Value shown on the chart |
|---|---|
| GPT-6 Astra | $8.99 |
| Fable 5.1 | $7.59 |
| Opus 5 | $4.50 |
| Opus 5.5 | $3.22 |
| Gemini 4 Argon (list) | $2.89 |
| Kimi K3 | $2.45 |
| Grok 4.7 | $1.96 |
| GPT-5.6 Terra | $1.92 |
| GPT-6.1 Sol | $1.61 |
| Gemini 4 Argon (intro) | $1.45 |
| GLM 5.3 | $1.25 |
| Grok 4.3 | $0.94 |
Shown as a preview with credit and a link to the original. Publishers can request removal.
View the original on cloudedjudgement.substack.com
