Models / O1 Pro 2025 03 19ID: openai/o1-pro-2025-03-19
by OpenAI·via OpenAI

O1 Pro 2025 03 19

OpenAI’s flagship frontier reasoning model. Engineered for multi-step autonomous planning, mathematical proof synthesis, scientific logic decomposition, and agentic workflows with a 128K-token context window.

PlaygroundQuick Start
Maker

OpenAI

Served On

OpenAI

Architecture

Frontier Reasoning Transformer

Latency Profile

Deep Deliberation (1.2s - 2.8s TTFT)

Optimized For:Multi-step chain-of-thought verificationCompetition-grade mathematicsScientific proofingContext: 128.0K

Industry Benchmarks & Evaluations

Standard Verified Metrics
SWE-bench Verified65.2%

Autonomous software engineering & real-world GitHub bug resolution.

MMLU-Pro (Reasoning)83.1%

Multi-disciplinary advanced reasoning across STEM and humanities.

GPQA Diamond67.5%

PhD-level biology, physics, chemistry, and domain-expert logic.

AIME 2024 (Math)76.4%

American Invitational Mathematics Examination competition logic.

Needle In A Haystack (NIAH)99.9%

Long-context document retrieval accuracy across 128K tokens.

Pricing

Rates are read live

Pricing for o1-pro-2025-03-19 is fetched from the live catalogue on load, so it is never served from a cache that could outlive a repricing.

Specifications

Context window

128.0K

tokens
Max output

16K

tokens
Modality

reasoning

Context window, compared

o1-pro-2025-03-19o1-pro-2025-03-19 — 128K tokens128Ko1o1 — 128K tokens128Ko3-minio3-mini — 128K tokens128Kqwq-plusqwq-plus — 128K tokens128Kgpt-5.4gpt-5.4 — 128K tokens128Kgpt-5.4-nanogpt-5.4-nano — 128K tokens128Kgpt-5.4-nano-2026-03-17gpt-5.4-nano-2026-03-17 — 128K tokens128K

Bars are scaled to 128K tokens. A model with no published context window reads Unknown, never zero.

Vision
Function calling
System prompt

Usage on nRouter

Usage is temporarily unavailable

Our aggregate read failed, so we cannot report traffic for this model right now.

nRouter SDK Integration

v2.2.1
curl https://api.nrouter.ai/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer ${NROUTER_API_KEY}" \
  -d '{
    "model": "openai/o1-pro-2025-03-19",
    "messages": [
      {
        "role": "system",
        "content": "You are a helpful assistant powered by o1-pro-2025-03-19 via nRouter."
      },
      {
        "role": "user",
        "content": "Explain distributed consensus algorithms."
      }
    ]
  }'

Availability

Availability is temporarily unavailable

Our own telemetry read failed, so we cannot report uptime or latency for this model right now. This says nothing about the model itself — it is not an outage, and we would rather show you nothing than a figure we did not measure.

Interactive Playground

Send a real test request to o1-pro-2025-03-19 using your virtual key.

Test it

Prompt
cURL
curl https://api.nrouter.ai/v1/chat/completions \
  -H "Authorization: Bearer $NROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"openai/o1-pro-2025-03-19","messages":[{"role":"user","content":"Hello!"}]}'

Managed Gateway Routing

Unified single-key access with automatic multi-region fallback, real-time credit enforcement, and sub-millisecond routing latency.

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