Within the latest AI battle, OpenAI’s o3-pro vs Google’s Gemini 2.5 Professional, the 2 are competing for the title of the perfect at superior reasoning and multimodal skill. o3-pro builds on the o3 basis, outfitted with enhanced reasoning, device use, and efficiency, significantly in science, programming, and reliability. The Gemini 2.5 Professional hits the mark with native multimodal enter, a million-token context size, and superior benchmark efficiency, significantly in programming and reasoning. On this weblog, we are going to evaluate the 2 heavyweight fashions when it comes to efficiency, options, price, and use instances within the trade!
What’s OpenAI o3 professional?
OpenAI-o3 Professional is OpenAI’s most up-to-date and highly effective AI reasoning mannequin, constructed on the reflective o3 structure however working in a high-compute, extended-thinking mode. It’s particularly designed to be the best performing in essentially the most complicated domains, together with science, math, programming, enterprise, and writing.
Key Options of OpenAI o3 professional
Let’s focus on the enhancements in o3 professional fashions:
- Improved reasoning: Knowledgeable evaluations present o3 Professional had a most well-liked ranking in comparison with the common o3 in each class, particularly for the science, programming, and enterprise duties.
- Instruments Integration: o3-pro can question the online, discover information, execute Python code, and recall previous conversations. In contrast to earlier reasoning fashions, utilizing these instruments will take longer to generate responses.
- Deep Step-by-Step Reasoning: Makes use of an inside “personal chain-of-thought”, implementing reasoning to design and consider solutions in a step-by-step method, which may present a degree of exactness on extra complicated duties related to math, coding, and scientific issues
- Multimodal Reasoning: They will course of and combine visible data instantly into their reasoning chain, which allows them to interpret and analyze photos alongside textual information.
Learn extra: 6 should know prompts for o3 professional
OpenAI o3‑professional vs Gemini 2.5 Professional
On this part, we’ll consider OpenAI o3‑professional and Gemini 2.5 Professional on three important capabilities:
- Picture evaluation
- Logical reasoning
- Numerical reasoning
Our goal is to see how nicely every mannequin performs its job, so we are able to perceive its strengths and weaknesses and effectiveness in the actual world. This breakdown will assist you, developer, researcher, or enterprise consumer, perceive higher which mannequin would swimsuit you greatest!
Process 1: Picture Evaluation
Immediate: “Clarify the uploaded picture in precisely 100 phrases. Present a concise however complete description.”
Enter Picture:
o3 professional Output:

Gemini 2.5 Professional Output:

Output Comparability
OpenAI o3‑Professional offers a extra full and visually grounded rationalization, referencing key picture components like labels and observer perspective. Gemini 2.5 Professional is correct and clear however much less detailed.
Facet | o3 Professional | Gemini 2.5 Professional |
Readability | Exact rationalization of refraction and diagram components | Normal description with emphasis on notion |
Technical Element | Contains refractive index, gentle bending, and path curvature | Focuses on obvious place, omits detailed mechanics |
Diagram Focus | Describes labeled components and arrows | Describes the general idea, much less tied to particular diagram options |
Rating: OpenAI o3‑professional: 1| Gemini 2.5 Professional 0
o3-pro takes this for its richer, extra image-aware response.
Process 2: Logical Reasoning
Immediate: “An organization had a knowledge breach involving precisely 3 of those 4 staff: Alex, Beth, Carl, and Dana.
Entry Necessities:
- Breach wanted each: somebody with technical entry AND somebody with bodily entry
- Alex: Technical solely | Beth: Bodily solely | Carl: Each | Dana: Each
Statements:
- Alex: “If Beth did it, then Carl didn’t.”
- Beth: “Both Dana is harmless OR precisely 2 individuals complete had been concerned.”
- Carl: “Alex is mendacity. Additionally, if I’m responsible, Dana is harmless.”
- Dana: “If Carl is correct about Alex mendacity, then Beth is incorrect about me being harmless.”
Guidelines:
- A minimum of one particular person tells the whole fact
- Responsible individuals received’t instantly expose themselves
- You’ll be able to’t lie about somebody’s guilt AND conspire with them
Query: Who’re the three responsible events? Present your full logical reasoning and proof.”
o3 professional Output:

Gemini 2.5 Professional Output:

Output Comparability
The Gemini 2.5 Professional mannequin displayed superior logical reasoning by its systematic breakdown of every premise, cautious evaluation of the proper use of logical propositions, and exhaustive consideration of every final result. Their issues additionally included considerate engagement with no matter doable contradictions. Whereas o3 Professional was capable of arrive on the right conclusion, their logical reasoning was usually impermissibly imprecise when key justifications weren’t included, and the depth of thought of their engagement with the train was missing. Rating: 3-1; in favor of Gemini, thoroughness, logical construction, and evaluation.
Facet | o3 Professional | Gemini 2.5 Professional |
Logical Methodology | Incomplete: Made logical leaps with out full justification | Rigorous: Transformed statements to formal logical propositions |
Systematic Evaluation | Partial: Didn’t consider all doable situations systematically | Complete: Evaluated all 4 doable responsible mixtures |
Rule Software | Superficial: Utilized guidelines however didn’t deeply analyze contradictions | Thorough: Recognized key deductions from guidelines (Carl have to be mendacity, Beth/Dana can’t each be responsible) |
Contradiction Dealing with | Ignored: Didn’t deal with potential logical inconsistencies within the puzzle | Acknowledged: Recognized that every one situations initially seem unimaginable, mentioned puzzle ambiguity |
Logical Rigor | Inadequate: A number of steps will not be totally justified | Wonderful: Every deduction is correctly supported |
Rating: OpenAI o3-Professional: 1 | Gemini 2.5 Professional: 1
Learn extra: 7 issues Gemini 2.5 professional excells at
Process 3: Numerical Reasoning
Immediate: “Think about this sequence the place every time period follows a selected mathematical rule:
Sequence: 2, 12, 36, 80, 150, ?
A: Discover the following quantity within the sequence and clarify the underlying sample.
B: Now take into account this modification: If we apply the identical sample rule however begin with 3 as a substitute of two, what could be the seventh time period of this new sequence?
C: Right here’s the difficult half: There’s a second legitimate mathematical interpretation of the unique sequence (2, 12, 36, 80, 150) that follows a very totally different sample rule. Discover this different sample and decide what the following two phrases could be beneath this interpretation.
D: Given each interpretations you’ve discovered, if somebody instructed you the sixth time period is definitely 252, which interpretation could be right, and what would the eighth time period be?
Query: Clear up all components, displaying your mathematical reasoning, formulation used, and verification of your patterns. Clarify why your different interpretation in Half C is mathematically legitimate and distinct out of your first resolution.”
o3 Professional Output:

Gemini 2.5 Professional Output:

Output comparability
Facet | o3 Professional | Gemini 2.5 Professional |
Sample Recognition | Used finite variations methodology (1st, 2nd, third variations) to determine quadratic sample | Immediately recognized method Tn = n³ + n² by position-value relationship |
Mathematical Rigor | Refined evaluation however flawed execution with elementary conceptual errors | Constant accuracy with correct method verification all through |
Presentation | Detailed step-by-step breakdown with clear distinction calculations | Clear, direct strategy with formula-based reasoning |
General Reliability | 2 main errors compromise resolution high quality regardless of superior methods | Error-free mathematical reasoning with right ultimate solutions |
Rating: OpenAI o3‑Professional: 1 | Gemini 2.5 Professional: 2
Closing Verdict
If persistently good reasoning issues to you, particularly for complicated duties consisting of multi-step reasoning, coding, or multimodal inputs, I might use Gemini 2.5 Professional, just because on this space of use case, it has confirmed very dependable efficiency, producing extra correct responses with a extra favorable price per achieved foundation. o3 Professional is nice for fast technology of responses and makes use of superior evaluation methods, but it surely incorporates crucial errors that make it unreliable for mission-critical duties the place accuracy issues.
Gemini 2.5 Professional offers confirmed, correct responses which were verified by systematic crucial evaluation. If you’re on the lookout for an ideal resolution for common duties, and even specialised duties the place getting the fitting response issues most (even whether it is barely slower), I might strongly advocate for using Gemini 2.5 Professional.
Facet | OpenAI o3 Professional | Gemini 2.5 Professional |
Reasoning Energy | Refined methods however liable to crucial errors in execution | Persistently correct with rigorous verification and systematic approaches |
Method High quality | Detailed evaluation, however requires error-checking as a result of computational errors | Thorough, methodical reasoning with correct verification in-built |
Reliability | Accommodates elementary errors (2/4 duties had crucial errors) | Error-free efficiency throughout complicated logical and mathematical duties |
Velocity | Sooner response technology | Slower processing however extra thorough evaluation |
Pricing | $20/M enter tokens, $80/M output tokens (excessive price, questionable reliability) | ~$1.25–$15/M tokens (less expensive with superior accuracy) |
Greatest For | Customers who want elaborate evaluation and may confirm outcomes independently | Customers needing dependable, correct outcomes for each common and mission-critical duties |
Benchmark: OpenAI o3 professional vs Gemini 2.5 professional

The next bar graph compares OpenAI o3 Professional and Google’s Gemini 2.5 Professional on two vital measures:
- AIME 2024 – A math competitors take a look at that’s exhausting and designed to evaluate math reasoning and problem-solving expertise.
- GPQA Diamond – A benchmark skilled question-answering benchmark for graduate research, designed to judge rational reasoning and topic mastery.
Efficiency Abstract:
On AIME 2024, the OpenAI o3 professional had a rating of 93%, in comparison with Gemini 2.5 Professional’s rating of 92, which is a really small distinction and offers OpenAI a slight benefit on math and logical reasoning duties.
On GPQA Diamond, each fashions had the identical efficiency rating of 84% and exhibited very sturdy efficiency in regard to graduate-level common information and important pondering.
Conclusion
OpenAI o3 Professional and Gemini 2.5 Professional are each superb AI fashions and are nice in numerous contexts. Based mostly on comparative evaluation, Gemini 2.5 Professional has improved accuracy and methodical analytical reasoning in additional complicated occurrences, akin to organized logic puzzles and mathematical evaluation, permitting for higher verification of standards and systematic reasoning to be utilized. o3 Professional exhibited good and complicated analytical reasoning however made severe errors which are unacceptable and undermine its reliability in a mission-critical software.
With respect to analyzing element, Gemini 2.5 Professional carried out nicely, utilizing a big context window, good multimodal capabilities, and good pricing, very best for general-purpose and secondary tasking. In the end, the choice is whether or not to decide on Gemini 2.5 Professional’s demonstrated accuracy and value effectiveness versus o3 Professional’s extra elaborate analytical consideration, which may be much less correct.
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