slopsubs

What a task really costs on a subscription

slopsubs: what a task really costs on a subscription

Effective cost vs intelligence

0102030405060$0.0003$0.001$0.003$0.01$0.03$0.1$0.3$1$3$10Intelligence indexEffective cost per task (USD, log scale)Opus 5.5GPT-6 AstraGPT-6.1 SolSonnet 5.5GPT-6.1 TerraGemini 4 ArgonFable 5.1Muse Spark 1.3Haiku 5.5GPT-6 Luna
  • API
  • Claude Ultra
  • ChatGPT Pro 200
  • OpenCode Go

Tasks per week on each plan

How many Intelligence Index tasks a plan's weekly cap pays for when spent on one model at one effort: the cap in API-priced dollars over the task's API price. A plan's rows are alternatives, not a sum, and bundled API credit is left out.

Published or measured capEstimated cap
Tasks a week (log scale)

Claude Ultra$1,846 a week at API pricesestimated cap

Theo: $200 in, $8,000 a month of API-priced inference out (as Max 20x, now Ultra). Not measured yet.

Opus 5.5184–1.89K
Sonnet 5.5184–3.61K
Haiku 5.54.49K–42.2K
Fable 5.1· half the cap71–206

ChatGPT Pro 200$1,148 a week at API pricesestimated cap

Twice Theo's measured $573.86 a week; OpenAI doubled the allowance on 2026-10-29. Not measured yet.

GPT-6 Astra184–806
GPT-6.1 Sol902–7.11K
GPT-6.1 Terra1.19K–16.1K
GPT-6 Luna7.55K–224K

OpenCode Goeach model's monthly allowance, per weekpublished cap

OpenCode's published monthly usage for each model, at list prices, with current promos, averaged over the weeks of a month

Gemini 4 Argon1.8
Haiku 5.58.4–79
GPT-6 Luna23–676

Effective cost per task, cheapest first

Each model on each selected plan, and at API prices when they are on, from low to max effort. Rows rank by their cheapest effort, so the top rows are the cheapest way to run a task at all.

API price, or a published or measured capEstimated cap
Effective cost per task (USD, log scale)
GPT-6 Luna· ChatGPT Pro 200$0.00021–$0.0061
Haiku 5.5· Claude Ultra$0.0011–$0.01
GPT-6.1 Terra· ChatGPT Pro 200$0.0029–$0.039
GPT-6 Luna· OpenCode Go$0.0034–$0.1
GPT-6 Luna· API$0.0051–$0.15
GPT-6.1 Sol· ChatGPT Pro 200$0.0065–$0.051
Sonnet 5.5· Claude Ultra$0.012–$0.24
Opus 5.5· Claude Ultra$0.024–$0.24
Haiku 5.5· OpenCode Go$0.029–$0.27
Haiku 5.5· API$0.044–$0.41
GPT-6 Astra· ChatGPT Pro 200$0.057–$0.25
GPT-6.1 Terra· API$0.071–$0.96
GPT-6.1 Sol· API$0.16–$1.27
Fable 5.1· Claude Ultra$0.21–$0.62
Sonnet 5.5· API$0.51–$10.02
Opus 5.5· API$0.98–$10.04
Gemini 4 Argon· OpenCode Go$1.28
GPT-6 Astra· API$1.42–$6.24
Muse Spark 1.3· API$2.39
Gemini 4 Argon· API$3.84
Fable 5.1· API$4.49–$13.04