The most powerful reasoning model available, but its extreme cost means it's only justified for the hardest problems where no other model will do.
92
Coding
62
Writing
95
Research
0
Images
2
Value
80
Long Context
Use this when
Solving the hardest math, science, and engineering problems where accuracy is non-negotiable and cost is secondary.
Skip this if
You need fast responses, are working on everyday tasks like drafting emails or summarizing documents, or have any budget sensitivity at all.
Pricing
$150.00/1M in
$600.00/1M out
→0%since May 2026
Context
200k tokens
Speed
Deliberate
o1-pro is available only via the OpenAI API and ChatGPT Pro subscription ($200/month). It does not support streaming and has longer latency than any other OpenAI model. Not suitable for high-volume workloads.
200K context window supports long technical documents and code repositories
Significantly more consistent than o1 on problems requiring sustained logical chains
Weaknesses
Extremely expensive at $150/$600 per million tokens — roughly 10x the cost of o1 and 30x Claude Sonnet 4.6
Very slow response times due to extended compute budget, making it unsuitable for interactive use
No image generation capability and limited multimodal utility compared to GPT-5.4
Real-world use cases
What people actually use o1-pro for.
Verifying a formal mathematical proof and identifying subtle logical errors across dozens of steps
Solving competition-level algorithmic programming problems (e.g., ICPC, Codeforces Div. 1) with full solution explanations
Synthesizing conflicting findings across a large corpus of research papers to produce a coherent technical analysis
How o1-pro compares
The nearest models people weigh against it, and what actually separates them.
vs GPT-4 Turbo — Against GPT-4 Turbo (OpenAI), o1-pro costs about 95% more per token, takes 1.6x the context and answers slower. GPT-4 Turbo is the one to check first if the price difference matters more than the ceiling.
vs GPT-4 Turbo (older v1106) — Against GPT-4 Turbo (older v1106) (OpenAI), o1-pro costs about 95% more per token, takes 1.6x the context and answers slower. GPT-4 Turbo (older v1106) is the one to check first if the price difference matters more than the ceiling.
vs GPT-4 Turbo Preview — Against GPT-4 Turbo Preview (OpenAI), o1-pro costs about 95% more per token, takes 1.6x the context and answers slower. GPT-4 Turbo Preview is the one to check first if the price difference matters more than the ceiling.
Price History
o1-pro pricing over time
→0% since May 31
90 data points · tracked daily since May 31, 2026
Ready to try it?
Start using o1-pro
Solving the hardest math, science, and engineering problems where accuracy is non-negotiable and cost is secondary.. Start free — no card required.
GPT-4 Turbo is OpenAI's high-capability flagship model featuring a 128K context window, trained on data up to April 2024. It delivers strong reasoning, coding, and instruction-following across complex tasks.
Verdict
A capable but aging flagship that has been outpaced by cheaper, faster successors in OpenAI's own lineup.
Quality score
75%
Pricing
$10.00/1M in
$30.00/1M out
Speed
Balanced
3/5 speed
Context
128k tokens
GPT-4 Turbo is available via the OpenAI API. It has largely been succeeded by GPT-4o, which is faster, supports vision natively, and is cheaper. Organizations should evaluate whether migrating to GPT-4o or o3 makes more sense before building new workflows on this model.
GPT-4 Turbo (v1106) is an older snapshot of OpenAI's flagship GPT-4 Turbo model released in November 2023, offering a 128K context window with strong general-purpose reasoning and instruction-following capabilities. It predates later GPT-4 Turbo updates and GPT-4o, making it a legacy choice for workflows locked to this specific version.
Verdict
A reliable but outdated GPT-4 snapshot that only makes sense when version pinning is a hard requirement.
Quality score
66%
Pricing
$10.00/1M in
$30.00/1M out
Speed
Balanced
3/5 speed
Context
128k tokens
This is a pinned model snapshot (v1106) and will not receive capability updates. OpenAI may deprecate older snapshots over time. Knowledge cutoff is April 2023. Not recommended for new deployments given the superior cost-performance of GPT-4o and GPT-4.1.
Legacy128K ContextPinned SnapshotGPT-4Premium
Best for
Teams requiring a pinned, stable version of GPT-4 Turbo for reproducible outputs in long-document analysis or complex instruction pipelines.
GPT-4 Turbo Preview is an early access version of GPT-4 Turbo, OpenAI's then-flagship model featuring a 128K context window and knowledge improvements over the original GPT-4. It was designed to deliver GPT-4-class reasoning at reduced cost compared to the original GPT-4.
Verdict
A once-capable flagship now overshadowed by faster, cheaper, and smarter successors.
Quality score
67%
Pricing
$10.00/1M in
$30.00/1M out
Speed
Balanced
3/5 speed
Context
128k tokens
This is a 'preview' variant that OpenAI has largely deprecated in favor of gpt-4-turbo and gpt-4o. The endpoint may be retired or redirected by OpenAI without notice. Check the OpenAI model deprecation schedule before building production applications on this model.
GPT-4Long ContextLegacyPremiumOpenAI
Best for
Complex multi-step reasoning, long-document analysis, and professional writing tasks requiring strong instruction-following.
OpenAI: o1-pro (OpenAI) is now indexed. The most powerful reasoning model available, but its extreme cost means it's only justified for the hardest problems where no other model will do.
o1-pro costs $150 per million input tokens and $600 per million output tokens on the API. A month of 10M input and 2M output tokens runs about $2700.00 at list price, before any batch or caching discounts.
What is o1-pro best for?
o1-pro is best for solving the hardest math, science, and engineering problems where accuracy is non-negotiable and cost is secondary.. It is a strong fit when that workflow matters more than the tradeoffs around premium pricing and deliberate speed.
When should I avoid o1-pro?
You need fast responses, are working on everyday tasks like drafting emails or summarizing documents, or have any budget sensitivity at all.
What is a cheaper alternative to o1-pro?
GPT-4 Turbo (OpenAI) at $10.00/1M/1M input against o1-pro's $150.00/1M/1M — roughly 95% less per token all in. A capable but aging flagship that has been outpaced by cheaper, faster successors in OpenAI's own lineup. Compare it first if o1-pro's pricing is the thing stopping you.
What is a faster alternative to o1-pro?
GPT-4 Turbo (older v1106) — balanced against o1-pro's deliberate, with 128k tokens of context. Worth the swap when response time is what your users notice rather than the last few points of reasoning depth.
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