GPT-6 Astra Law API pricing
OpenAI charges $10 per million input tokens and $50 per million output tokens for GPT-6 Astra Law (gpt-6-astra-law), and $1 per million cached input tokens. A typical request of 1,000 input and 500 output tokens costs $0.035.
GPT-6 Astra Law price per million tokens
| Token type | Standard |
|---|---|
| Input | $10 |
| Cached input | $1 |
| Output | $50 |
API model id: gpt-6-astra-law. GPT-6 Astra Law supports a 922K-token context window, up to 128K output tokens, image input, tool calling and reasoning.
What GPT-6 Astra Law costs per request
| Request | 1 request | 1,000 requests | 1M requests |
|---|---|---|---|
| Short chat message (300 in, 200 out) | $0.013 | $13.00 | $13,000.00 |
| Typical request (1K in, 500 out) | $0.035 | $35.00 | $35,000.00 |
| Long document summary (20K in, 1K out) | $0.25 | $250.00 | $250,000.00 |
| Coding agent step (50K in, 2K out) | $0.60 | $600.00 | $600,000.00 |
At standard rates. A token is about 4 characters of English text, so 1,000 tokens is roughly 750 words.
How GPT-6 Astra Law compares
- For a typical request, GPT-6 Astra Law is cheaper than 0% of the other models on apicost.app.
- Claude Fable 5 from Anthropic costs $10 input and $50 output per million tokens, so a typical request is $0.035: about the same price as GPT-6 Astra Law.
- Gemini 3.1 Pro Preview from Google Gemini costs $2 input and $12 output per million tokens, so a typical request is $0.008: 4.4× cheaper than GPT-6 Astra Law.
- DeepSeek V4 Pro from DeepSeek costs $1.32 input and $3.96 output per million tokens, so a typical request is $0.0033: 11× cheaper than GPT-6 Astra Law.
Models with a similar price
| Model | Provider | Input / 1M | Cached input / 1M | Output / 1M | Typical request |
|---|---|---|---|---|---|
| Claude Opus 4.5 | Anthropic | $5 | $0.5 | $25 | $0.0175 |
| Claude Opus 4.6 | Anthropic | $5 | $0.5 | $25 | $0.0175 |
| GPT-5.5 | OpenAI | $5 | $0.5 | $30 | $0.02 |
| GPT-6 Astra | OpenAI | $10 | $1 | $50 | $0.035 |
| Claude Fable 5 | Anthropic | $10 | $1 | $50 | $0.035 |
| Claude Fable 5.1 | Anthropic | $10 | $0.25 | $50 | $0.035 |
| Claude Mythos 5 | Anthropic | $10 | $1 | $50 | $0.035 |
| Claude Mythos 5.1 | Anthropic | $10 | $0.25 | $50 | $0.035 |
Other OpenAI models
- GPT-4.1 $2 / $8
- GPT-4.1 mini $0.4 / $1.6
- GPT-4o $2.5 / $10
- GPT-4o mini $0.15 / $0.6
- GPT-5 $1.25 / $10
- GPT-5 mini $0.25 / $2
- GPT-5 nano $0.05 / $0.4
- GPT-5.1 $1.25 / $10
- GPT-5.2 $1.75 / $14
- GPT-5.4 $2.5 / $15
- GPT-5.4 mini $0.75 / $4.5
- GPT-5.4 nano $0.2 / $1.25
- GPT-5.5 $5 / $30
- GPT-5.6 $4 / $20
- GPT-5.6 Luna $0.2 / $1.2
- GPT-5.6 Terra $2 / $12
- GPT-6 Astra $10 / $50
- GPT-6 Luna $0.1 / $0.5
- GPT-6 Sol $2 / $10
- GPT-6.1 Sol $2 / $10
- GPT-6.1 Terra $1 / $5
- o3 $2 / $8
Every OpenAI model side by side, with batch, caching and long-context prices: OpenAI API pricing. Ways to pay less: batch API, prompt caching, the cheapest models.
Questions and answers
How much does the GPT-6 Astra Law API cost?
OpenAI charges $10 per million input tokens and $50 per million output tokens for GPT-6 Astra Law (gpt-6-astra-law), and $1 per million cached input tokens. A typical request of 1,000 input and 500 output tokens costs $0.035.
Is there a cheaper way to use GPT-6 Astra Law?
Prompt caching lowers the price of input that repeats across requests to $1 per million tokens.
What is the context window of GPT-6 Astra Law?
GPT-6 Astra Law accepts up to 922,000 input tokens, roughly 692,000 words of English, and writes up to 128,000 output tokens per response. Filling the whole context window once costs $9.22 in input tokens.
Is GPT-6 Astra Law cheaper than Claude Fable 5?
They cost about the same. Claude Fable 5 from Anthropic costs $10 input and $50 output per million tokens, so a typical request is $0.035: about the same price as GPT-6 Astra Law.
Source: OpenAI pricing, via the LiteLLM price list.