IFX — AI Inference Cost Index

IFX Optimizer · CLI

Find the money you're wasting on AI.

Drop in your codebase. The Optimizer prices every LLM call against the live IFX index and flags the waste — frontier models on trivial tasks, missing caching, silent retries — then proves the savings with your real usage.

We ran it on 22 of our own apps. One was bleeding 32%.

See how it works npx @ifx/optimizer scan .

Free to scan. Source never leaves your machine.

IFX — the benchmark for AI inference costs

IFX Advisor

Find the right AI model.

Live cost data across the leading models, blended into one daily index. Describe your task — the advisor picks the cheapest model that clears the bar.

Get alerted when a cheaper model clears your bar

Cost of Intelligence

Cheapest model meeting each capability bar

Each bar tracks the cheapest blended $/1M-token model whose capability score meets the gate. Base 100 at inception — falling means it is getting cheaper to buy that level of capability.

Scale aa-intelligence-index-v4.1 · base 100 on 2026-06-18

Frontier · ≥50

≈ GPT-5.5 / Opus-class

100.00

0.00%

Champion

Gemini-3.5 Flash

Blended
$3.3750/1M
Capability
50
Qualifiers
5

Capable · ≥40

≈ DeepSeek V4 Pro-class

100.00

0.00%

Champion

GPT-5.4 Mini

Blended
$1.6875/1M
Capability
40
Qualifiers
10

Budget · ≥25

≈ GPT-4-class

100.00

0.00%

Champion

GPT-5.4 Nano

Blended
$0.4625/1M
Capability
38
Qualifiers
20

This Week in Inference Pricing

IFX rose 2.09% to 81.97

The Inference Index closed at 81.97 on August 29, 2026, rose 2.09% versus the previous reading. The index basket holds 29 models across leading providers (drawn from a tracked universe of 326), blended at a 3:1 input-to-output token mix.

Per-1M-token prices across the 29 priced basket members today range from $0.06 (lowest blended) to $11.25 (highest blended), with an average blended price of $2.55.

The index is normalized to 100 at inception (2024-04-01), so today's value reads as a percentage of basket cost versus the inception date.

Top movers · 30 day

Biggest price changes across the tracked universe

  • DeepSeek V3.1open-hosted

    DeepSeek

    $0.83/1M+94.12%

  • Llama 3.3 70Bopen-hosted

    Meta

    $0.71/1M-19.77%

  • GLM-4.6open-hosted

    Zhipu

    $0.76/1M-13.14%

  • Llama 4 Scoutopen-hosted

    Meta

    $0.17/1M+11.67%