The most powerful reasoning model OpenAI offers — but its extreme pricing means you should reach for it only when accuracy genuinely cannot be compromised.
95
Coding
62
Writing
96
Research
0
Images
4
Value
85
Long Context
Use this when
Elite-level reasoning tasks where accuracy is paramount and cost is not a constraint — graduate-level math, competitive programming, and rigorous scientific analysis.
Skip this if
You need fast responses, are working on general writing or summarization tasks, or have any sensitivity to API cost.
Pricing
$20.00/1M in
$80.00/1M out
→0%since May 2026
Context
200k tokens
Speed
Deliberate
o3 Pro is only available via the OpenAI API and ChatGPT Pro subscription tier. Response times can range from tens of seconds to several minutes depending on problem complexity. Output pricing at $80/M tokens is 4x the cost of standard o3.
Top-tier performance on STEM benchmarks, surpassing standard o3 and competing directly with Gemini 3.1 Pro on mathematical reasoning
Extended thinking budget allows deeper verification of multi-step logical chains, reducing hallucinations on hard problems
200K context window handles large codebases, lengthy research papers, and complex multi-document analysis
Exceptional at formal proof verification, algorithm design, and problems requiring exhaustive case analysis
Weaknesses
At $20/$80 per million tokens, it is among the most expensive models available — Claude Sonnet 4.6 delivers strong reasoning at a fraction of the cost
Deliberate reasoning speed makes it unsuitable for latency-sensitive or high-throughput applications
Overkill for most everyday tasks where o3-mini or GPT-4o achieve sufficient quality at far lower cost
Real-world use cases
What people actually use OpenAI: o3 Pro for.
Solving olympiad-level mathematics problems with full step-by-step proof verification
Auditing complex smart contract code for security vulnerabilities across a large multi-file codebase
Synthesizing and critically analyzing a 150-page clinical trial dataset to surface methodological flaws
Price History
OpenAI: o3 Pro pricing over time
→0% since May 9
48 data points · tracked daily since May 9, 2026
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Start using OpenAI: o3 Pro
Elite-level reasoning tasks where accuracy is paramount and cost is not a constraint — graduate-level math, competitive programming, and rigorous scientific analysis.. Start free — no card required.
Recommendations are made independently based on real-world use and public benchmarks. See our disclosures for details.
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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
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Quality score
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Pricing
$10.00/1M in
$30.00/1M out
Speed
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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
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Pricing
$10.00/1M in
$30.00/1M out
Speed
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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.
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Best for
Teams requiring a pinned, stable version of GPT-4 Turbo for reproducible outputs in long-document analysis or complex instruction pipelines.
Pricing moves, ranking shifts, and capability updates.
New ModelMar 27, 2026
OpenAI: o3 Pro — added to UseRightAI
OpenAI: o3 Pro (OpenAI) is now indexed. The most powerful reasoning model OpenAI offers — but its extreme pricing means you should reach for it only when accuracy genuinely cannot be compromised.
OpenAI: o3 Pro is best for elite-level reasoning tasks where accuracy is paramount and cost is not a constraint — graduate-level math, competitive programming, and rigorous scientific analysis.. It is a strong fit when that workflow matters more than the tradeoffs around premium pricing and deliberate speed.
When should I avoid OpenAI: o3 Pro?
You need fast responses, are working on general writing or summarization tasks, or have any sensitivity to API cost.
What is a cheaper alternative to OpenAI: o3 Pro?
Meta: Llama 3.1 8B Instruct is the lower-cost option to compare first when you want a similar workflow fit with less token spend.
What is a faster alternative to OpenAI: o3 Pro?
GPT-5.5 is the better pick when response time matters more than maximum depth or premium quality.
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