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LLM API cost calculator
Set the tokens in and out of one request and how many requests you send a day. Every one of the 39 live models with a published price is ranked by what that workload costs, cheapest first. The prices are each maker's list price on its own API, from the models.dev catalog as of October 25, 2026; the full table is on LLM API pricing.
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Cheapest: MiMo-V2.5 at $9.66 a month · Top of the bench index: Claude Opus 5.5 at $420 (30,000 requests over 30 days)
| # | Model | Per request | Per 1K requests | Per month | AW Index |
|---|---|---|---|---|---|
| 1 | MiMo-V2.5Xiaomi · $0.14 / $0.28 per 1M | $0.00032 | $0.32 | $9.66 | — |
| 2 | Claude Haiku 5.5Anthropic · $0.10 / $0.50 per 1M | $0.00035 | $0.35 | $10.50 | 50.5 |
| 3 | GPT-6 LunaOpenAI · $0.10 / $0.50 per 1M | $0.00035 | $0.35 | $10.50 | 28 |
| 4 | Qwen 3.8 FlashAlibaba · $0.15 / $0.47 per 1M | $0.00041 | $0.41 | $12.39 | — |
| 5 | GLM-5.3 FlashZhipu AI · $0.15 / $0.50 per 1M · open weights | $0.00042 | $0.42 | $12.75 | 32.4 |
| 6 | MiniMax M3.1 FlashMiniMax · $0.15 / $0.60 per 1M · open weights | $0.00047 | $0.47 | $13.95 | 48.8 |
| 7 | MiniMax M3MiniMax · $0.30 / $1.20 per 1M · open weights | $0.00093 | $0.93 | $27.90 | 5.8 |
| 8 | MiMo-V2.6 ProXiaomi · $0.435 / $0.87 per 1M · open weights | $0.001 | $1.00 | $30.02 | 65.1 |
| 9 | Gemini 3.5 Flash-LiteGoogle · $0.30 / $2.50 per 1M | $0.0014 | $1.45 | $43.50 | — |
| 10 | DeepSeek V4 ProDeepSeek · $0.66 / $1.98 per 1M · open weights | $0.0018 | $1.78 | $53.46 | 31.8 |
| 11 | Gemini 3.6 FlashGoogle · $0.75 / $3.75 per 1M | $0.0026 | $2.63 | $78.75 | — |
| 12 | Gemini 3.7 FlashGoogle · $0.75 / $3.75 per 1M | $0.0026 | $2.63 | $78.75 | — |
| 13 | Gemini 3.8 FlashGoogle · $0.75 / $3.75 per 1M | $0.0026 | $2.63 | $78.75 | 43.3 |
| 14 | Muse Spark 1.1Meta · $1.25 / $4.25 per 1M | $0.0036 | $3.58 | $107 | 30.8 |
| 15 | Muse Spark 1.2Meta · $1.25 / $4.25 per 1M | $0.0036 | $3.58 | $107 | — |
| 16 | Muse Spark 1.3Meta · $1.25 / $4.25 per 1M | $0.0036 | $3.58 | $107 | 74.9 |
| 17 | Mistral Large 4Mistral · $1.36 / $4.18 per 1M | $0.0037 | $3.71 | $111 | 32.6 |
| 18 | GLM-5.2Zhipu AI · $1.40 / $4.40 per 1M · open weights | $0.0039 | $3.86 | $116 | 21.2 |
| 19 | GLM-5.3Zhipu AI · $1.40 / $4.40 per 1M · open weights | $0.0039 | $3.86 | $116 | 60 |
| 20 | Grok 4.5xAI · $2 / $6 per 1M | $0.0054 | $5.40 | $162 | 34.9 |
| 21 | Grok 4.6xAI · $2 / $6 per 1M | $0.0054 | $5.40 | $162 | 58.1 |
| 22 | Grok 4.7xAI · $2 / $6 per 1M | $0.0054 | $5.40 | $162 | 59.4 |
| 23 | Qwen 3.8 MaxAlibaba · $2 / $6 per 1M | $0.0054 | $5.40 | $162 | 62.9 |
| 24 | Gemini 3.5 FlashGoogle · $1.50 / $9 per 1M | $0.0059 | $5.85 | $176 | 21.3 |
| 25 | Claude Sonnet 5Anthropic · $2 / $10 per 1M | $0.007 | $7.00 | $210 | 27.9 |
| 26 | Claude Sonnet 5.5Anthropic · $2 / $10 per 1M | $0.007 | $7.00 | $210 | 93.5 |
| 27 | Gemini 4 ArgonGoogle · $2 / $10 per 1M | $0.007 | $7.00 | $210 | 79.5 |
| 28 | GPT-6 SolOpenAI · $2 / $10 per 1M | $0.007 | $7.00 | $210 | 68.6 |
| 29 | GPT-6.1 SolOpenAI · $2 / $10 per 1M | $0.007 | $7.00 | $210 | 82.9 |
| 30 | Kimi K3.1 ProMoonshot · $2 / $10 per 1M | $0.007 | $7.00 | $210 | 86 |
| 31 | Kimi K3Moonshot · $3 / $15 per 1M · open weights | $0.01 | $10.50 | $315 | 27.3 |
| 32 | ChatGPT-5.6OpenAI · $4 / $20 per 1M | $0.01 | $14.00 | $420 | 50 |
| 33 | Claude Opus 5.5Anthropic · $4 / $20 per 1M | $0.01 | $14.00 | $420 | 100 |
| 34 | Claude Opus 4.8Anthropic · $5 / $25 per 1M | $0.02 | $17.50 | $525 | 37.2 |
| 35 | Claude Opus 5Anthropic · $5 / $25 per 1M | $0.02 | $17.50 | $525 | 72.8 |
| 36 | GPT-5.5OpenAI · $5 / $30 per 1M | $0.02 | $19.50 | $585 | 42.6 |
| 37 | Fable 5Anthropic · $10 / $50 per 1M | $0.04 | $35.00 | $1,050 | 72.1 |
| 38 | Fable 5.1Anthropic · $10 / $50 per 1M | $0.04 | $35.00 | $1,050 | 90.7 |
| 39 | GPT-6 AstraOpenAI · $10 / $50 per 1M | $0.04 | $35.00 | $1,050 | 87.4 |
Worked examples
Each example workload at 1,000 requests a day for 30 days, no caching, at list prices as of October 25, 2026.
Chat reply: 1,500 tokens in, 400 out
Cheapest: MiMo-V2.5, $9.66 a month ($0.00032 a request)
Top of the bench index: Claude Opus 5.5, $420 a month
Most expensive: GPT-6 Astra, $1,050 a month
RAG answer: 8,000 tokens in, 600 out
Cheapest: Claude Haiku 5.5, $33.00 a month ($0.0011 a request)
Top of the bench index: Claude Opus 5.5, $1,320 a month
Most expensive: GPT-6 Astra, $3,300 a month
Coding agent step: 40,000 tokens in, 2,000 out
Cheapest: Claude Haiku 5.5, $150 a month ($0.005 a request)
Top of the bench index: Claude Opus 5.5, $6,000 a month
Most expensive: GPT-6 Astra, $15,000 a month
Long-document summary: 120,000 tokens in, 1,500 out
Cheapest: GPT-6 Luna, $383 a month ($0.01 a request)
Top of the bench index: Claude Opus 5.5, $15,300 a month
Most expensive: GPT-6 Astra, $38,250 a month
Quick answers
How much does an LLM API cost for 1,000 chat requests a day?
At 1,500 input and 400 output tokens each, that is 30,000 requests over 30 days. The cheapest of the 39 priced models is MiMo-V2.5 at $9.66 a month, and the most expensive is GPT-6 Astra at $1,050. Claude Opus 5.5, the top model on the ArtificialWatch bench index, costs $420. List prices as of October 25, 2026.
How do you calculate LLM API cost?
Per request: input tokens times the input price plus output tokens times the output price, each price per million tokens, divided by one million. Multiply by requests for a total. Input read from a prompt cache is billed at the cached-input price where the maker publishes one, and a prompt past a model's long-prompt threshold is billed at its long-prompt rates for the whole request. Most reasoning models bill their thinking tokens as output, so count them in the output figure.
Are these the prices I will pay?
They are each maker's published list price on its own API, from the models.dev catalog as of October 25, 2026. Batch discounts, committed-use deals, free tiers, taxes and reseller or cloud prices are not included, so treat a result as an estimate, not a quote.
Cheap is one axis. For how good each model is, see the bench index and the coding leaderboard; for what shipped when, new AI model releases. Prices change when a new model lands. To hear when one goes live, watch free.
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