Head to head
GPT-4 Turbo vs GPT-4o
GPT-4 Turbo from OpenAI against GPT-4o from OpenAI — specification, price and every benchmark both makers have published, in one table.
Benchmarks
GPT-4o leads
GPT-4o wins 5 of the 5 benchmarks both models report, GPT-4 Turbo wins 0, by a wide margin. The average gap across shared tests is 10.9 points.
Price
GPT-4o is cheaper
On a 3:1 input-to-output mix, GPT-4o costs $4.38 per million tokens against $15.00 for GPT-4 Turbo — about 3.4× less.
What actually differs
- These two are closely matched on the specification side — same broad capabilities, same licensing posture. The decision comes down to the benchmark rows and the price.
Scorecard
Which is better at what
Maths, coding, reasoning and the rest — one line each, averaged over the benchmarks both models actually report.
| Category | GPT-4 Turbo | GPT-4o | Better at this |
|---|---|---|---|
| ReasoningGPQA Diamond | 48.0% | 53.6% | GPT-4o+5.6 |
| MathsNeither model reports this | — | — | Not comparable |
| CodingHumanEval | 87.1% | 90.2% | GPT-4o+3.1 |
| KnowledgeMMLU-Pro | 63.7% | 74.7% | GPT-4o+11.0 |
| MultimodalMMMU | 63.1% | 69.1% | GPT-4o+6.0 |
| Instruction followingNeither model reports this | — | — | Not comparable |
| Human preferenceLMArena Elo | 1256 | 1285 | GPT-4o+29 |
| Categories wonOut of 5 comparable | 0 | 5 | GPT-4o |
Each category averages only the benchmarks every model here reports, so no one is credited for a test the other did not run. A category with no shared test is marked Not comparable rather than guessed at.
Side by side
GPT-4 Turbo and GPT-4o, row by row
| Attribute | GPT-4 TurboOpenAI | GPT-4oOpenAI |
|---|---|---|
| Specification | ||
| MakerWho built it | OpenAI | OpenAI |
| Released | 2024-04 | 2024-05 |
| Context windowHow much can go in at once | 128,000 tokens | 128,000 tokens |
| Max output | 4,096 tokens | 16,384 tokens |
| Input | Text, Image | Text, Image, Audio |
| ReasoningSpends extra tokens thinking before it answers | No | No |
| Tool calling | Yes | Yes |
| Knowledge cutoff | 2023-12 | 2023-10 |
| Licence | Proprietary | Proprietary |
| Open weightsCan you download and run it yourself | No | No |
| Price | ||
| Input priceUSD per million tokens in | $10.00 | $2.50 |
| Output priceUSD per million tokens out | $30.00 | $10.00 |
| Cached input | Not reported | $1.25 |
| Blended 3:1A 3-in-to-1-out million-token mix — a fairer single number than input price alone | $15.00 | $4.38Cheapest |
| Published benchmarks | ||
| MMLU-Pro12,000 reasoning-heavy multiple-choice questions across 14 academic subjects, with ten options instead of four. The harder successor to MMLU. | ||
| GPQA Diamond198 graduate-level physics, chemistry and biology questions written to be Google-proof. PhD holders in the matching field score about 65%. | ||
| HumanEval164 short Python functions written from a docstring. Saturated at the frontier — kept here for continuity with older models. | ||
| MMMUCollege-level questions that require reading charts, diagrams, tables and photographs alongside the text. | ||
| LMArena EloElo rating from blind pairwise votes by the public on LMArena. Measures what people prefer, not what is correct. | ||
| Links | Full page | Full page |
| Row verified | 2026-08 | 2026-08 |
Where these numbers come from
Every score on this page is a published figure, taken from the model's own card, system card, technical report or release post, or from a public leaderboard. CorX Labs did not run these evaluations. Most are self-reported by the lab that built the model, which means they were produced under that lab's own choice of prompt, scaffold and number of attempts — so treat them as a starting point for a shortlist, not as a settled ranking.
A score someone other than the model's maker measured is marked Independent and names its measurer. Those are the stronger numbers on this page — an outside harness has no reason to flatter anyone — and there are not many of them.
Where a figure has not been published, the cell reads Not reported rather than an estimate. Nothing here is inferred, interpolated or guessed. Each model records the month its row was last checked. Full method and caveats.
Questions
GPT-4 Turbo or GPT-4o?
Is GPT-4 Turbo better than GPT-4o?
GPT-4o wins 5 of the 5 benchmarks both models report, GPT-4 Turbo wins 0, by a wide margin. The average gap across shared tests is 10.9 points.
Which is cheaper, GPT-4 Turbo or GPT-4o?
On a 3:1 input-to-output mix, GPT-4o costs $4.38 per million tokens against $15.00 for GPT-4 Turbo — about 3.4× less.
What is the difference between GPT-4 Turbo and GPT-4o?
These two are closely matched on the specification side — same broad capabilities, same licensing posture. The decision comes down to the benchmark rows and the price.
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