o4-mini on Run BiOS

o4-mini

+50%First top-up bonus

Top up $20 and we add 50%. That gives you about 9.1M input tokens extra on o4-mini, on us.

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195K contextVisionTool callingReasoningPrompt caching

Pricing

USD per 1M tokens

Input	$1.10
Output	$4.40
Cached input	$0.2875% below fresh input

Billed per token with no minimum and no monthly fee. Price your workload

Capabilities and limits

Context window: 195K tokens
Max output: 98K tokens
Modality: multimodal
Tool calling: Supported
Vision: Supported
Reasoning: Always on
Reasoning effort: low, medium, high (default: medium)
Prompt caching: Supported (automatic)

Measured performance

Time to first token (p50): 1.5 s
Time to first token (p95): 3.0 s
Throughput (avg): 1187.5 tok/s
Throughput (p50): 1000.0 tok/s

Measured on real Run BiOS traffic over the trailing 7d. Your figures will vary with prompt shape and region.

Call it now: OpenAI-compatible

curl https://api.runbios.ai/v1/chat/completions \
  -H "Authorization: Bearer $BIOS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "o4-mini",
    "messages": [{ "role": "user", "content": "Hello" }]
  }'

Existing OpenAI SDK code works by changing the base URL and the key. API overview

Model card

Curated by Run BiOS · benchmark figures, where present, are the card’s own, not our measurements

o4-mini is OpenAI's latest small o-series model. It is optimized for fast, effective reasoning with exceptionally efficient performance in coding and visual tasks. It is succeeded by GPT-5 Mini.

Model details

Property	Value
Developer	OpenAI
Model ID	`o4-mini`
OpenAI default snapshot	`o4-mini-2025-04-16`
Input	Text, image
Output	Text
Context window	200,000 tokens
Max output tokens	100,000
Knowledge cutoff	Jun 01, 2024
Reasoning	Yes

Details above are from OpenAI's official model page; context window and input types are as served on Run BiOS.

On Run BiOS

Always reasons. Reasoning levels low, medium, high; the default is medium. This model cannot turn reasoning off: a request for no reasoning runs at the lowest available level.
Reasoning summaries. When reasoning is on, OpenAI may return a summary of the model's reasoning: in reasoning_content on the OpenAI API, and in thinking blocks on the Anthropic Messages API when thinking.display is summarized. OpenAI does not return a summary for every request.
Tool calling. Function tools with tool_choice auto, required, a named function or none, including parallel tool calls, and together with reasoning.
Structured outputs. response_format with json_schema or json_object.
Image input. Text and image input, text output.
Sampling parameters. temperature, top_p, penalties, stop and seed are not applied to this model on Run BiOS, because it always reasons; the request is still served.
Prompt caching. Automatic for repeated prompt prefixes; the minimum cacheable length varies with the request. Cache reads bill at the cached-input rate, and there is no separate charge for cache writes. Send a stable prompt_cache_key to improve cache hits.
Two APIs. Works with the OpenAI Chat Completions API (/v1/chat/completions) and the Anthropic Messages API (/v1/messages).

More from o4-mini

o3$2.00/$8.00 o3-mini$1.10/$4.40