Lines connect measured and explicitly modeled effort points. Filled dots are measured by Artificial Analysis; hollow dots are formula-derived. Snapshot: .
Cost re-baselined 2026-08-03. AA revised its cost-per-task basis since the 2026-07-29 snapshot — Intelligence Index scores came back identical while $/task rose 12.5–24.3% (Anthropic 12.5–14.5%, Gemini 16.5%, Grok 16.8%, OpenAI 18.8–24.3%), with per-token list prices unchanged. Compare costs within this snapshot only.
| Model | Effort | Index | $/task | Point | Source / basis |
|---|
Configurations. AA's Fable point is specifically Claude Fable 5
(Adaptive Reasoning, Max Effort, Opus 4.8 Fallback). OpenAI says max gives GPT-5.6 more
reasoning time than xhigh, while ultra coordinates four agents in parallel by default.
Ultra is a separate multi-agent mode without a directly comparable AA cost/task point, so it is not plotted.
OpenAI cut Luna 80% ($1.00/$6.00 → $0.20/$1.20) and Terra 20%
($2.50/$15.00 → $2.00/$12.00) on 2026-07-30; Sol is unchanged at $5.00/$30.00.
Grok 4.5 is plotted without a max rung: xAI's docs list
reasoning_effort as low/medium/high only, and AA 404s on that slug.
Cost axis is AA Intelligence-Index cost per task, not coding-agent cost. Hollow points are modeled scenarios, not published measurements. To update, edit AA_SNAPSHOT and keep the companion Markdown in sync.