Solar Pro 4
Solar Pro 4 (upstage/solar-pro4) is a language model from Upstage on the OceanToken API at $0.09 per 1M input tokens and $0.36 per 1M output tokens, with a 524K-token context window and reasoning, tool calling, structured outputs.
Solar Pro 4 is Upstage's cost-efficient large language model, featuring a 524K context window.
Create an account or sign in to OceanToken.Context window
524K tokens
Input
text
Output
text
BUILD WITH IT
- Multi-step reasoning
- Tool-using agents
- Structured outputs (JSON)
Model ID upstage/solar-pro4
Base URL https://api.oceantoken.ai/v1
MAKE IT YOURS
One account. Your next idea.
- Input
- $0.09 / 1M tokens
- Output
- $0.36 / 1M tokens
- Cached input
- $0.018 / 1M tokens
Official price as of October 18, 2026. The console always shows the current price.
Open OceanToken ↗Specs, request sample and alternatives in the docs ↗Frequently asked questions
Solar Pro 4 is Upstage's cost-efficient large language model, featuring a 524K context window.
Solar Pro 4 costs $0.09 per 1M input tokens and $0.36 per 1M output tokens. Cached input costs $0.018 per 1M tokens. These are official prices as of October 18, 2026, charged per use to your prepaid balance. The console always shows the current price.
Solar Pro 4 has a context window of 524K tokens (524,288 tokens).
Solar Pro 4 supports tool calling, structured outputs and reasoning. It takes text input and returns text. The catalog does not list image input (vision) for it.
Send requests to https://api.oceantoken.ai/v1/chat/completions with the model ID upstage/solar-pro4 and your OceanToken API key. The API is OpenAI-compatible, so an OpenAI SDK needs only the base URL https://api.oceantoken.ai/v1 and your key. The Responses API and the Anthropic Messages API (/v1/messages) work too. The same OceanToken API key works for every model your account can use. Full reference: docs.oceantoken.ai.
OceanToken is prepaid. Open Credits in the console, choose an amount and pay by card on Stripe's hosted checkout page (Link works too; Alipay and WeChat Pay are not available). Each top-up is between $10 and $100,000, and your balance updates a few seconds after payment. Have a trial code? Redeem it on the same page.
Purchased credits are valid for 12 months from the date of purchase. Credits from trial codes, promotions or gifts may have a shorter validity. All purchases are final and non-refundable, except where the law requires a refund. Section 6 of the Terms of Service has the details.
Not if the request never ran: a request refused for an insufficient balance or by a safety check, or one whose provider fails before returning any output, is not charged. A video job that fails releases the amount it held. If a request breaks off after the model has started producing output, for example a stream cut off part-way, you pay for the tokens that were processed and generated for it.
There are two ways to buy. Pay-as-you-go is self-serve: sign up, add prepaid credits and use every model in the catalog at its official price. Enterprise customers get agreement pricing based on expected usage: email support@oceantoken.ai.