Solar Pro 4 pricing
$0.09 per 1M input tokens and $0.36 per 1M output tokens. In real work that is 0.04¢ per chat answer and 0.14¢ to summarize a 20-page PDF.
What Solar Pro 4 costs per task
Token counts estimated from a measured model of the same lab (Claude Haiku 5.5), rescaled by tokenizer. Reasoning tokens are billed as output.
| Task | Cost | Tokens used | Price rank | Basis |
|---|---|---|---|---|
| Answer a chat question | 0.04¢$0.36 / 1,000 | 43 in · 757 out · 244 reasoning | 40 of 336 | estimated |
| Reply to a customer email | 0.02¢$0.22 / 1,000 | 259 in · 208 out · 346 reasoning | 58 of 336 | estimated |
| Write a 1,500-word blog post | 0.10¢$1.00 / 1,000 | 64 in · 2,555 out · 200 reasoning | 22 of 336 | estimated |
| Write 10 product descriptions | 0.13¢$1.34 / 1,000 | 325 in · 1,294 out · 2,342 reasoning | 42 of 336 | estimated |
| Translate 1,000 words | 0.07¢$0.67 / 1,000 | 1,315 in · 1,545 out | 48 of 336 | estimated |
| Proofread one page (500 words) | 0.04¢$0.41 / 1,000 | 708 in · 655 out · 304 reasoning | 36 of 336 | estimated |
| Summarize a 20-page PDF | 0.14¢$1.38 / 1,000 | 12,924 in · 482 out · 118 reasoning | 34 of 336 | estimated |
| Extract data from an invoice | 0.04¢$0.40 / 1,000 | 391 in · 412 out · 591 reasoning | 37 of 336 | estimated |
| Analyze a 200-row spreadsheet | ≥0.61¢$6.05 / 1,000 | 3,900 in · 406 out · 15,434 reasoning | 80 of 336 | estimated |
| Answer from 5 retrieved documents (RAG) | 0.09¢$0.89 / 1,000 | 3,721 in · 786 out · 753 reasoning | 44 of 336 | estimated |
| Classify 100 support tickets | 0.06¢$0.60 / 1,000 | 1,254 in · 384 out · 961 reasoning | 12 of 336 | estimated |
| Review 500 lines of code | 0.44¢$4.37 / 1,000 | 5,109 in · 2,338 out · 8,532 reasoning | 70 of 336 | estimated |
| Write a SQL query | 0.05¢$0.52 / 1,000 | 130 in · 603 out · 810 reasoning | 46 of 336 | estimated |
| Run a 50-step coding agent | 6.2¢$61.92 / 1,000 | 2,226,312 in · 14,925 out · 29,550 reasoning | 22 of 336 | modeled |
Price at every provider
List prices per 1M tokens (input / output) at each host serving Solar Pro 4 through OpenRouter today. Hosts can differ in quantization, context and speed.
| Provider | Input / output | Cached input | Context | Uptime |
|---|---|---|---|---|
| U Upstageunknown | $0.09 / $0.36 | $0.018 | 524K | 100% |
| U Upstageunknown | $0.09 / $0.36 | $0.018 | 524K | 100% |
Price history
First seen in our price history on Aug 14, 2026 at $0.03 input / $0.12 output. Since then the output price moved from $0.12 to $0.36 per 1M tokens (1 change).
FAQ
How much does Solar Pro 4 cost?
Solar Pro 4 costs $0.09 per 1 million input tokens and $0.36 per 1 million output tokens, with cached input at $0.018 (list price on Oct 18, 2026). In practice one chat answer costs about 0.04¢ and summarizing a 20-page PDF about 0.14¢.
Where is Solar Pro 4 cheapest?
Among 2 providers we track, the lowest list price today is at Upstage: $0.09 input and $0.36 output per 1M tokens.
Does Solar Pro 4 charge for reasoning tokens?
Yes. Reasoning (thinking) tokens are billed as output tokens. That is why the cost per task can be much higher than the visible answer suggests - our task costs include them.
Is the Solar Pro 4 cost per task measured or estimated?
Estimated: Solar Pro 4 was not run directly. Tokens come from Claude Haiku 5.5 and are rescaled by the tokenizer of Upstage. Real usage can differ.