Polarison

Prices verified September 14, 2026

What will your AI API actually cost?

Compare 18 models from OpenAI, Anthropic, Google, xAI and DeepSeek side by side — prices, benchmarks and real-workload estimates instead of per-token guesswork.

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Popular comparisons

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GPT-5.6 Terra vs Claude Sonnet 5
$2.00 / $12.00$2.00 / $10.00
GPT-6 Astra vs Claude Fable 5.1
$10.00 / $50.00$10.00 / $50.00
GPT-5.6 Sol vs Claude Opus 5
$4.00 / $20.00$5.00 / $25.00
GPT-5.6 Luna vs Claude Haiku 4.5
$0.20 / $1.20$1.00 / $5.00
Claude Sonnet 5 vs Gemini 3.5 Flash
$2.00 / $10.00$1.50 / $9.00
Gemini 3.1 Pro vs Claude Opus 5
$2.00 / $12.00$5.00 / $25.00
Grok 4.6 vs Claude Sonnet 5
$2.00 / $6.00$2.00 / $10.00
DeepSeek V4 Pro vs GPT-5.6 Terra
$1.32 / $3.96$2.00 / $12.00
Gemini 3.8 Flash vs GPT-5.6 Luna
$0.75 / $3.75$0.20 / $1.20

Capability vs. price

Full benchmarks →

Most capable

  1. GPT-6 AstraECI 166.3 · $20.00
  2. Claude Fable 5.1ECI 164.5 · $20.00
  3. Claude Opus 5ECI 162.3 · $10.00

Best value

  1. GPT-5.6 LunaECI 156.3 · $0.45
  2. Gemini 3.8 FlashECI 156.5 · $1.50
  3. GPT-5.6 TerraECI 159.1 · $4.50

ECI = Epoch Capabilities Index (Epoch AI). Price = blended USD per 1M tokens. Best value = no cheaper model scores higher.

Subscriptions and coding tools

All plans →

AI subscriptions

AI coding tools

Open-weight models, by provider →

What DeepInfra, Together, Fireworks and others charge to run gpt-oss, DeepSeek, Kimi, GLM, Qwen and Llama.

Image, video and voice APIs →

Sora 2, Veo 3.1, Nano Banana, GPT Image, Whisper and text-to-speech prices, per image, second or minute.

Every model, cheapest first

Model details →
ModelProviderInputCached inputOutputContext
GPT-5.6 LunaOpenAI$0.20$0.02$1.201.05M
DeepSeek V4.1 FlashDeepSeek$0.30$0.006$1.201M
Gemini 3.5 Flash-LiteGoogle$0.30$0.03$2.501.05M
Gemini 2.5 FlashGoogle$0.30$0.03$2.501.05M
Gemini 3.8 FlashGoogle$0.75$0.075$3.751.05M
Grok 4.3xAI$1.25$0.20$2.501M
DeepSeek V4 ProDeepSeek$1.32$0.044$3.961M
Claude Haiku 4.5Anthropic$1.00$0.10$5.00200K
Grok 4.6xAI$2.00$0.50$6.00500K
Gemini 3.5 FlashGoogle$1.50$0.15$9.001.05M
Gemini 2.5 ProGoogle$1.25$0.125$10.001.05M
Claude Sonnet 5Anthropic$2.00$0.20$10.001M
GPT-5.6 TerraOpenAI$2.00$0.20$12.001.05M
Gemini 3.1 ProPreviewGoogle$2.00$0.20$12.001.05M
GPT-5.6 SolOpenAI$4.00$0.40$20.001.05M
Claude Opus 5Anthropic$5.00$0.50$25.001M
GPT-6 AstraOpenAI$10.00$1.00$50.001.05M
Claude Fable 5.1Anthropic$10.00$0.25$50.001M

USD per 1M tokens, standard tier. Sorted by blended price (3 input : 1 output).

Estimate your monthly API bill

Standard-tier list prices. Long-context rates apply automatically where the provider publishes a threshold. Excludes cache-write surcharges, taxes, batch and volume discounts.

Pricing guides

All guides →

GPT vs Claude API Cost: Every Current Model Compared

OpenAI’s GPT-6 and GPT-5.6 against Anthropic’s Claude Fable, Opus, Sonnet and Haiku — list prices, real-workload costs and the details that change the math.

The Cheapest AI APIs Right Now, Ranked

Every model from OpenAI, Anthropic, Google, xAI and DeepSeek ranked by blended price per token, plus the caveats that can flip the ranking.

How AI API Pricing Works: Tokens, Caching and Batch Explained

A plain-English guide to input and output tokens, prompt caching, batch discounts and long-context tiers — with a worked cost example.