StepFunopen weightsreasoningStep 5 Preview pricing
$1.00 per 1M input tokens and $2.70 per 1M output tokens. In real work that is 0.45¢ per chat answer and 1.6¢ to summarize a 20-page PDF.
What Step 5 Preview costs per task
Token counts estimated from a measured model of the same lab (Gemini 3.8 Flash), rescaled by tokenizer. Reasoning tokens are billed as output.
| Task | Cost | Tokens used | Price rank | Basis |
|---|---|---|---|---|
| Answer a chat question | 0.45¢$4.47 / 1,000 | 35 in · 801 out · 843 reasoning | 219 of 336 | estimated |
| Reply to a customer email | 0.18¢$1.77 / 1,000 | 275 in · 130 out · 424 reasoning | 219 of 336 | estimated |
| Write a 1,500-word blog post | 0.99¢$9.85 / 1,000 | 52 in · 2,666 out · 964 reasoning | 179 of 336 | estimated |
| Write 10 product descriptions | 0.83¢$8.30 / 1,000 | 298 in · 1,146 out · 1,817 reasoning | 191 of 336 | estimated |
| Translate 1,000 words | 1.3¢$13.44 / 1,000 | 1,330 in · 1,319 out · 3,167 reasoning | 204 of 336 | estimated |
| Proofread one page (500 words) | 0.37¢$3.71 / 1,000 | 718 in · 664 out · 443 reasoning | 201 of 336 | estimated |
| Summarize a 20-page PDF | 1.6¢$16.35 / 1,000 | 12,961 in · 544 out · 713 reasoning | 229 of 336 | estimated |
| Extract data from an invoice | 0.45¢$4.48 / 1,000 | 459 in · 548 out · 943 reasoning | 217 of 336 | estimated |
| Analyze a 200-row spreadsheet | 2.8¢$28.38 / 1,000 | 6,413 in · 1,035 out · 7,100 reasoning | 187 of 336 | estimated |
| Answer from 5 retrieved documents (RAG) | 0.96¢$9.55 / 1,000 | 3,670 in · 680 out · 1,499 reasoning | 228 of 336 | estimated |
| Classify 100 support tickets | 1.9¢$19.35 / 1,000 | 1,421 in · 580 out · 6,059 reasoning | 257 of 336 | estimated |
| Review 500 lines of code | 1.1¢$10.99 / 1,000 | 5,297 in · 2,109 out | 158 of 336 | estimated |
| Write a SQL query | 0.45¢$4.45 / 1,000 | 137 in · 555 out · 1,043 reasoning | 212 of 336 | estimated |
| Run a 50-step coding agent | 46¢$464 / 1,000 | 2,233,025 in · 14,970 out · 47,150 reasoning | 165 of 336 | modeled |
Price at every provider
List prices per 1M tokens (input / output) at each host serving Step 5 Preview through OpenRouter today. Hosts can differ in quantization, context and speed.
| Provider | Input / output | Cached input | Context | Uptime |
|---|---|---|---|---|
| I InferenceNetfp4 | $1.00 / $2.70 | $0.05 | 1M | 100% |
| F Featherlessfp4 | $1.00 / $2.70 | $0.10 | 262K | 100% |
 DeepInfrafp8 | $1.00 / $2.70 | $0.10 | 1M | 100% |
| S StepFunfp8 | $1.00 / $2.70 | $0.10 | 1M | 100% |
Price history
First seen in our price history on Oct 11, 2026 at $1.00 input / $2.70 output. The list price has not changed since.
FAQ
How much does Step 5 Preview cost?
Step 5 Preview costs $1.00 per 1 million input tokens and $2.70 per 1 million output tokens, with cached input at $0.10 (list price on Oct 18, 2026). In practice one chat answer costs about 0.45¢ and summarizing a 20-page PDF about 1.6¢.
Where is Step 5 Preview cheapest?
Among 4 providers we track, the lowest list price today is at InferenceNet: $1.00 input and $2.70 output per 1M tokens.
Does Step 5 Preview 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 Step 5 Preview cost per task measured or estimated?
Estimated: Step 5 Preview was not run directly. Tokens come from Gemini 3.8 Flash and are rescaled by the tokenizer of StepFun. Real usage can differ.