o1 vs o3-deep-research vs Claude Opus 4
o1 comes out ahead, 61 to 55 and 49 on our weighted score, and it is the cheaper option too.
- Our pick
OpenAIo1
61/100- ECI141.9
- Price$15.00 / $60.00
- Context200K
- OpenAI
o3-deep-research
49/100- ECI—
- Price—
- Context200K
AnthropicClaude Opus 4
55/100- ECI142.7
- Price$15.00 / $75.00
- Context200K
o1 is our pick
o1 is the better all-round choice, scoring 61/100 against Claude Opus 4 (55) and o3-deep-research (49). It leads on inputs & features. The score weighs inputs & features 60%, context window 40%. None of the shared benchmarks cover every model here yet, so capability is left out of this verdict.
- CapabilityNot enough dataNo independent benchmark covers every model here yet
- Lowest priceo1o1 $26.25 · Claude Opus 4 $30.00 per 1M tokens (3:1 blend) · o3-deep-research unpriced
- Longest contextAbout the sameo1 200,000 · o3-deep-research 200,000 · Claude Opus 4 200,000 tokens
- Widest inputso1 and Claude Opus 4o1: Text, Images, PDFs · o3-deep-research: Text, Images · Claude Opus 4: Text, Images, PDFs
- Self-hostingNo open weightsAll three are available only through APIs
| Measure | Weight | o1 | o3-deep-research | Claude Opus 4 |
|---|---|---|---|---|
| Inputs & features | 60% | 80 | 60 | 70 |
| Context window | 40% | 32 | 32 | 32 |
| Overall | 100% | 61/100 | 49/100 | 55/100 |
Left out because at least one model lacks the data: capability and price. The remaining weights were rescaled.
Every spec in one table
Highlighted cells lead their row. Dashes mean the data is not published.
| Specification | o1OpenAI | o3-deep-researchOpenAI | Claude Opus 4Anthropic |
|---|---|---|---|
| Capability | |||
| Capabilities Index (ECI) | 141.9 | — | 142.7 (best) |
| ECI rank | #92 of 148 | — | #87 of 148 (best) |
| GPQA DiamondGraduate-level science questions | 76.8% (best) | — | 76.3% |
| FrontierMath Tiers 1–3Research-level mathematics | 14.7% | — | — |
| OTIS Mock AIME 2024–2025Competition mathematics | 73.3% (best) | — | 64.4% |
| SWE-bench VerifiedFixing real GitHub issues | — | — | 70.7% |
| SimpleQA VerifiedShort factual questions | 41.1% | — | — |
| Price per million tokens | |||
| Input | $15.00 | — | $15.00 |
| Output | $60.00 (best) | — | $75.00 |
| Cached input | $7.50 | — | — |
| Blended (3:1) | $26.25 (best) | — | $30.00 |
| Long-context rate | Same rate | — | Same rate |
| Price source | Official OpenAI API | — | Median of 5 providers |
| Limits | |||
| Context window | 200,000 tokens | 200,000 tokens | 200,000 tokens |
| Max output | 100,000 tokens (best) | 100,000 tokens (best) | 32,000 tokens |
| Inputs and features | |||
| Text | Yes | Yes | Yes |
| Images | Yes | Yes | Yes |
| PDFs | Yes | No | Yes |
| Audio | No | No | No |
| Video | No | No | No |
| Reasoning | Yeslow · medium · high | Yes | Yes |
| Tool calling | Yes | Yes | Yes |
| Structured output | Yes | No | No |
| Availability | |||
| Weights | Proprietary | Proprietary | Proprietary |
| API model ID | o1 | — | — |
| API providers | 9 (best) | — | 5 |
| Released | Dec 5, 2024 | Jun 26, 2024 | May 22, 2025 |
| Knowledge cutoff | Sep 2023 | May 2024 | Mar 31, 2025 |
What would a month cost?
Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.
- o1$270.00
- o3-deep-research—
- Claude Opus 4$300.00
Which should you choose?
Which is better: o1, o3-deep-research or Claude Opus 4?
o1 is the better all-round choice, scoring 61/100 against Claude Opus 4 (55) and o3-deep-research (49). It leads on inputs & features. The score weighs inputs & features 60%, context window 40%. None of the shared benchmarks cover every model here yet, so capability is left out of this verdict.
Which is cheaper, o1, o3-deep-research or Claude Opus 4?
o1 is cheaper at $15.00 input / $60.00 output per million tokens (official OpenAI API price). Claude Opus 4 costs $15.00 input / $75.00 output per million tokens (median across 5 API providers). At a typical mix of three input tokens to one output token, that is $26.25 per million tokens for o1 versus $30.00 for Claude Opus 4 (1.1× as much). o3-deep-research has no published per-token price.
Which scores higher on benchmarks?
There is no independent benchmark that covers all three models yet. o1 has an ECI of 141.9, o3-deep-research has not been scored yet and Claude Opus 4 has an ECI of 142.7.
Which is better for coding?
There are no published SWE-bench Verified results for o1 and o3-deep-research yet, so there is no like-for-like coding score. Test both on a sample of your own tasks. All three support tool calling for agent workflows.
Which has the bigger context window?
o1, o3-deep-research and Claude Opus 4 share the same 200,000-token context window. Maximum output per response: o1 up to 100,000, o3-deep-research up to 100,000, Claude Opus 4 up to 32,000 tokens.
Which can read images, PDFs, audio or video?
o1 accepts text, images and PDFs; o3-deep-research accepts text and images; Claude Opus 4 accepts text, images and PDFs. o1 handles the widest range of inputs.
Are any of these open source?
No. o1, o3-deep-research and Claude Opus 4 are proprietary and only available through APIs and apps.
Which is newer?
Claude Opus 4 is the newest, released May 22, 2025. o1 came out Dec 5, 2024; o3-deep-research came out Jun 26, 2024. Knowledge cutoff: o1 Sep 2023, o3-deep-research May 2024, Claude Opus 4 Mar 31, 2025.
How do you decide the winner?
Each model gets a 0–100 score on capability (50%, independent benchmark results); price (25%, blended price per million tokens (3 input : 1 output), log scale); inputs & features (15%, image, PDF, audio and video input, tool calling, structured output and reasoning); context window (10%, maximum tokens per request, log scale). Dimensions missing for any model are dropped and the remaining weights rescaled, so every model is judged on the same evidence. Specs and prices come from public model listings and the labs’ own API pages; capability scores come from independent benchmark runs. Data updated Oct 4, 2026.
