Data
LLM API price index
List prices for 57 models from 7 providers, each read from the provider’s own pricing page and dated. US dollars per million tokens.
See the prices Download the data (JSON)
Prices
Standard list price for text, on each provider’s own API, at the default context length. Output ranges from $0.40 to $180.00 per million tokens. Sorted by output price.
57 of 57 models
Cached-input prices are in the wider layout and the JSON.
| Model | Output | Input | Cached input | Source |
|---|---|---|---|---|
GPT-5 nanoOpenAI · gpt-5-nano | $0.40 | $0.05 | $0.005 | OpenAIchecked Oct 17 |
Gemini 2.5 Flash-LiteGoogle · gemini-2.5-flash-lite | $0.40 | $0.10 | $0.01 | Googlechecked Oct 17 |
Claude Haiku 5.5Anthropic · claude-haiku-5-5tieredprompt > 100,000 tokens: $0.50 in, $2.50 out | $0.50 | $0.10 | $0.01 | Anthropicchecked Oct 17 |
GPT-6 LunaOpenAI · gpt-6-lunatieredinput > 272K tokens: $0.20 in, $0.75 out | $0.50 | $0.10 | $0.01 | OpenAIchecked Oct 17 |
DeepSeek V4.1 FlashDeepSeek · deepseek-flashtieredoff-peak hours: $0.15 in, $0.60 out | $1.20 | $0.30 | $0.006 | DeepSeekchecked Oct 17 |
GPT-5.4 nanoOpenAI · gpt-5.4-nano | $1.25 | $0.20 | $0.02 | OpenAIchecked Oct 17 |
Gemini 3.1 Flash-LiteGoogle · gemini-3.1-flash-lite | $1.50 | $0.25 | $0.025 | Googlechecked Oct 17 |
GPT-5 miniOpenAI · gpt-5-mini | $2.00 | $0.25 | $0.025 | OpenAIchecked Oct 17 |
Grok Build 0.1xAI · grok-build-0.1tieredprompt >= 200k tokens: $2.00 in, $4.00 out | $2.00 | $1.00 | $0.20 | xAIchecked Oct 17 |
Gemini 2.5 FlashGoogle · gemini-2.5-flash | $2.50 | $0.30 | $0.03 | Googlechecked Oct 17 |
Gemini 3.5 Flash-LiteGoogle · gemini-3.5-flash-lite | $2.50 | $0.30 | $0.03 | Googlechecked Oct 17 |
Grok 4.20 Multi-AgentxAI · grok-4.20-multi-agent-0309tieredprompt >= 200k tokens: $2.50 in, $5.00 out | $2.50 | $1.25 | $0.20 | xAIchecked Oct 17 |
Grok 4.20 Non-ReasoningxAI · grok-4.20-0309-non-reasoningtieredprompt >= 200k tokens: $2.50 in, $5.00 out | $2.50 | $1.25 | $0.20 | xAIchecked Oct 17 |
Grok 4.20 ReasoningxAI · grok-4.20-0309-reasoningtieredprompt >= 200k tokens: $2.50 in, $5.00 out | $2.50 | $1.25 | $0.20 | xAIchecked Oct 17 |
Grok 4.3xAI · grok-4.3tieredprompt >= 200k tokens: $2.50 in, $5.00 out | $2.50 | $1.25 | $0.20 | xAIchecked Oct 17 |
Gemini 3 Flash (preview)Google · gemini-3-flash-previewpreview | $3.00 | $0.50 | $0.05 | Googlechecked Oct 17 |
Pareto 26.10Unbiased · pareto | $3.20 | $0.80 | $0.03 | Unbiasedchecked Oct 17 |
Gemini 3.6 FlashGoogle · gemini-3.6-flashprice change Jan 1 | $3.75 | $0.75 | $0.075 | Googlechecked Oct 17 |
Gemini 3.8 FlashGoogle · gemini-3.8-flashprice change Jan 1 | $3.75 | $0.75 | $0.075 | Googlechecked Oct 17 |
DeepSeek V4 ProDeepSeek · deepseek-v4-protieredoff-peak hours: $0.66 in, $1.98 out | $3.96 | $1.32 | $0.044 | DeepSeekchecked Oct 17 |
Kimi K2.6Moonshot AI · kimi-k2.6 | $4.00 | $0.95 | $0.16 | Moonshot AIchecked Oct 17 |
Kimi K2.7 CodeMoonshot AI · kimi-k2.7-code | $4.00 | $0.95 | $0.19 | Moonshot AIchecked Oct 17 |
o4-miniOpenAI · o4-mini | $4.40 | $1.10 | $0.275 | OpenAIchecked Oct 17 |
GPT-5.4 miniOpenAI · gpt-5.4-mini | $4.50 | $0.75 | $0.075 | OpenAIchecked Oct 17 |
Claude Haiku 4.5Anthropic · claude-haiku-4-5$0.0088 per 1,000 words out (measured) | $5.00 | $1.00 | $0.10 | Anthropicchecked Oct 17 |
Grok 4.5xAI · grok-4.5tieredprompt >= 200k tokens: $4.00 in, $12.00 out | $6.00 | $2.00 | $0.30 | xAIchecked Oct 17 |
Grok 4.6xAI · grok-4.6tieredprompt >= 200k tokens: $4.00 in, $12.00 out | $6.00 | $2.00 | $0.50 | xAIchecked Oct 17 |
Grok 4.7xAI · grok-4.7tieredprompt >= 200k tokens: $4.00 in, $12.00 out | $6.00 | $2.00 | $0.50 | xAIchecked Oct 17 |
Kimi K2.7 Code (high speed)Moonshot AI · kimi-k2.7-code-highspeed | $8.00 | $1.90 | $0.38 | Moonshot AIchecked Oct 17 |
GPT-4.1OpenAI · gpt-4.1 | $8.00 | $2.00 | $0.50 | OpenAIchecked Oct 17 |
o3OpenAI · o3 | $8.00 | $2.00 | $0.50 | OpenAIchecked Oct 17 |
Gemini 2.5 ProGoogle · gemini-2.5-protieredprompt > 200k tokens: $2.50 in, $15.00 out | $10.00 | $1.25 | $0.125 | Googlechecked Oct 17 |
Claude Sonnet 5Anthropic · claude-sonnet-5$0.0293 per 1,000 words out (measured) | $10.00 | $2.00 | $0.20 | Anthropicchecked Oct 17 |
Claude Sonnet 5.5Anthropic · claude-sonnet-5-5 | $10.00 | $2.00 | $0.10 | Anthropicchecked Oct 17 |
GPT-6 SolOpenAI · gpt-6-soltieredinput > 272K tokens: $4.00 in, $15.00 out | $10.00 | $2.00 | $0.20 | OpenAIchecked Oct 17 |
GPT-6.1 SolOpenAI · gpt-6.1-soltieredinput > 272K tokens: $4.00 in, $15.00 out | $10.00 | $2.00 | $0.10 | OpenAIchecked Oct 17 |
Gemini 4 ArgonGoogle · gemini-4-argonprice change Dec 1 | $10.00 | $2.00 | $0.10 | Googlechecked Oct 17 |
Gemini 3.1 Pro (preview)Google · gemini-3.1-pro-previewpreviewtieredprompt > 200k tokens: $4.00 in, $18.00 out | $12.00 | $2.00 | $0.20 | Googlechecked Oct 17 |
GPT-5.2OpenAI · gpt-5.2 | $14.00 | $1.75 | $0.175 | OpenAIchecked Oct 17 |
GPT-5.3 CodexOpenAI · gpt-5.3-codex | $14.00 | $1.75 | $0.175 | OpenAIchecked Oct 17 |
GPT-5.4OpenAI · gpt-5.4tieredinput > 272K tokens: $5.00 in, $22.50 out | $15.00 | $2.50 | $0.25 | OpenAIchecked Oct 17 |
Claude Sonnet 4.5Anthropic · claude-sonnet-4-5deprecated | $15.00 | $3.00 | $0.30 | Anthropicchecked Oct 17 |
Claude Sonnet 4.6Anthropic · claude-sonnet-4-6 | $15.00 | $3.00 | $0.30 | Anthropicchecked Oct 17 |
Kimi K3Moonshot AI · kimi-k3 | $15.00 | $3.00 | $0.30 | Moonshot AIchecked Oct 17 |
Claude Opus 5.5Anthropic · claude-opus-5-5 | $20.00 | $4.00 | $0.20 | Anthropicchecked Oct 17 |
Claude Opus 4.5Anthropic · claude-opus-4-5 | $25.00 | $5.00 | $0.50 | Anthropicchecked Oct 17 |
Claude Opus 4.6Anthropic · claude-opus-4-6 | $25.00 | $5.00 | $0.50 | Anthropicchecked Oct 17 |
Claude Opus 4.7Anthropic · claude-opus-4-7 | $25.00 | $5.00 | $0.50 | Anthropicchecked Oct 17 |
Claude Opus 4.8Anthropic · claude-opus-4-8$0.0654 per 1,000 words out (measured) | $25.00 | $5.00 | $0.50 | Anthropicchecked Oct 17 |
Claude Opus 5Anthropic · claude-opus-5$0.0737 per 1,000 words out (measured) | $25.00 | $5.00 | $0.50 | Anthropicchecked Oct 17 |
GPT-5.5OpenAI · gpt-5.5tieredinput > 272K tokens: $10.00 in, $45.00 out | $30.00 | $5.00 | $0.50 | OpenAIchecked Oct 17 |
Claude Fable 5Anthropic · claude-fable-5$0.1369 per 1,000 words out (measured) | $50.00 | $10.00 | $1.00 | Anthropicchecked Oct 17 |
Claude Fable 5.1Anthropic · claude-fable-5-1$0.1309 per 1,000 words out (measured) | $50.00 | $10.00 | $0.25 | Anthropicchecked Oct 17 |
Claude Mythos 5Anthropic · claude-mythos-5limited access | $50.00 | $10.00 | $1.00 | Anthropicchecked Oct 17 |
Claude Mythos 5.1Anthropic · claude-mythos-5-1limited access | $50.00 | $10.00 | $0.25 | Anthropicchecked Oct 17 |
GPT-6 AstraOpenAI · gpt-6-astratieredinput > 272K tokens: $20.00 in, $75.00 out | $50.00 | $10.00 | $1.00 | OpenAIchecked Oct 17 |
GPT-5.5 ProOpenAI · gpt-5.5-protieredinput > 272K tokens: $60.00 in, $270.00 out | $180.00 | $30.00 | — | OpenAIchecked Oct 17 |
Price changes on the calendar
Prices the providers have already announced, with their dates.
- Gemini 4 Argon (Google): $2.00 in / $10.00 out today, $4.00 / $20.00 from December 1, 2026. Source.
- Gemini 3.8 Flash (Google): $0.75 in / $3.75 out today, $1.50 / $7.50 from January 1, 2027. Source.
- Gemini 3.6 Flash (Google): $0.75 in / $3.75 out today, $1.50 / $7.50 from January 1, 2027. Source.
Change log
Every list-price change we record, newest first, built from the history file. Follow it in a feed reader: Atom feed · JSON feed.
- Announced Gemini 3.8 Flash: $1.50 in / $7.50 out from January 1, 2027 (announced). Google's pricing page lists Gemini 3.8 Flash at $1.50 in / $7.50 out per million tokens from January 1, 2027, up from $0.75 in / $3.75 out. Seen on October 17, 2026. Source.
- Announced Gemini 3.6 Flash: $1.50 in / $7.50 out from January 1, 2027 (announced). Google's pricing page lists Gemini 3.6 Flash at $1.50 in / $7.50 out per million tokens from January 1, 2027, up from $0.75 in / $3.75 out. Seen on October 17, 2026. Source.
- Announced Gemini 4 Argon: $4.00 in / $20.00 out from December 1, 2026 (announced). Google's pricing page lists Gemini 4 Argon at $4.00 in / $20.00 out per million tokens from December 1, 2026, up from $2.00 in / $10.00 out. Seen on October 17, 2026. Source.
- Index started The Unbiased LLM Price Index started tracking 57 models on October 17, 2026, each price read from the provider's own pricing page.
Per 1,000 words
A per-token price hides how much text a token holds. For the 6 models we have measured, the table converts output price to 1,000 words using the characters per output token from our Verbosity Index and 6 characters per word. Our battery is heavy on code and JSON, so treat these as this battery’s figures. The tokenizer tax tool does the same for your own text.
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Method
- What counts as the list price: the standard price for text in and text out on the provider’s own API, at the default context length. Batch, priority and off-peak rates are left out of the main columns. Higher prices for long prompts are shown under the model name.
- What gets a row: a model gets a row only when its price is on the provider’s own pricing page. Gateways and aggregators are never a source.
- Sources: Anthropic, OpenAI, Google, xAI, DeepSeek, Moonshot AI, Unbiased. Each checked October 17, 2026.
- History: every price is kept as a dated interval in price-index-history.json. History starts with our own checks, so the first date is when we first saw a price, not when the provider set it.
- Not yet covered:
- Mistral: The API price table on mistral.ai/pricing renders in the browser and did not come through WebFetch or curl on 17 Oct; the docs models page lists models without prices. Needs a browser read before any row is added.
- Alibaba (Qwen), Zhipu (GLM), MiniMax, Cohere, Amazon (Nova), Meta (Llama API): Not collected in this run.
Questions
Which LLM API has the lowest output price?
Of the 57 models in this index, checked October 17, 2026, the lowest standard output list price is $0.40 per million tokens, for GPT-5 nano and Gemini 2.5 Flash-Lite. List price is not cost per task: models write different amounts and their tokenizers cut text differently.
Where do these prices come from?
Each row is read from the provider's own pricing page, linked in the Source column with the date we checked it. Gateways and aggregators are never used as a source. The data is in /data/price-index.json.
How often is the index updated?
Every row shows the date it was last checked. The plan is a weekly re-check of every source page, with changes logged in the history file and the changelog.
What does price per 1,000 words mean?
For the 6 models we have measured, it is the output list price converted with the characters per output token from our Verbosity Index (Edition 2) and 6 characters per word. Other models show “not measured” rather than an estimate.