o1
OpenAI • Reasoning
Context Window200K
Knowledge CutoffUnknown
o1 vs Claude 3 Opus
Both premium for complex reasoning — o1 wins on chain-of-thought math and code, Claude 3 Opus on broad analytical capability.
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Claude 3 Opus
Anthropic • Text + Vision
Context Window200K
Knowledge CutoffUnknown
Editorial Verdict
o1 is optimized for hard math and science; Claude 3 Opus is optimized for nuanced general analysis.
o1 and Claude 3 Opus are both premium models for high-quality outputs, but they approach quality differently. o1 uses extended internal reasoning chains for hard problems; Claude 3 Opus uses broad training and Constitutional AI for nuanced responses. For math and science reasoning, o1 leads. For general analysis, writing, and nuanced reasoning, Claude 3 Opus leads. These are complementary tools.
o1
- State-of-the-art performance on hard math and competitive programming benchmarks
- Extended reasoning chain for multi-step problem decomposition
- Good general-purpose capability alongside reasoning specialization
Best for: Math, competitive programming, and hard science reasoning tasks
Claude 3 Opus
- Superior nuanced reasoning for open-ended analysis and complex documents
- 200K context window for long-document processing
- More natural, conversational responses without the stilted reasoning artifacts of chain models
Best for: Nuanced analysis, long-document review, and general-purpose high-quality outputs
Pricing sourced from OpenRouter — updates as their catalog changes.
Pricing Comparison
All values pull from OpenRouter and update as their catalog changes.
| Metric | o1 | Claude 3 Opus | Winner |
|---|---|---|---|
| Input (per 1M tokens) | Custom | Custom | N/A |
| Output (per 1M tokens) | Custom | Custom | N/A |
| Request fee | N/A | N/A | N/A |
| Image fee | N/A | N/A | N/A |
Cost Estimator
Estimate monthly billing using real OpenRouter prices.
o1 Total
VariableClaude 3 Opus Total
VariableSavings unavailable (pricing not published for one model).
Capability Signals
Scores are directional estimates from model metadata — not official benchmark results.
o1MMLU Signal (Reasoning)Claude 3 Opus
76%
76%
o1HumanEval Signal (Coding)Claude 3 Opus
69%
69%
o1Agentic Tooling SignalClaude 3 Opus
69%
69%
o1Multimodal SignalClaude 3 Opus
69%
78%
Capabilities Matrix
Feature highlights for architecture and production fit.
o1 Strengths
- Large context window for long documents and codebases.
- Balanced general-purpose profile for chat, extraction, and automation tasks.
Claude 3 Opus Strengths
- Supports image inputs for multimodal analysis workflows.
- Large context window for long documents and codebases.
- Balanced general-purpose profile for chat, extraction, and automation tasks.
API Implementation
Quick start snippets for each provider style.
OpenAI (Python)
from openai import OpenAI
client = OpenAI()
response = client.chat.completions.create(
model="openai/o1",
messages=[{"role": "user", "content": "Hello"}]
)
print(response.choices[0].message.content)Anthropic (Python)
import anthropic
client = anthropic.Anthropic()
message = client.messages.create(
model="anthropic/claude-3-opus",
max_tokens=1024,
messages=[{"role": "user", "content": "Hello"}]
)
print(message.content)Choose o1 when...
- You process large documents or code repositories in a single prompt.
- You want a balanced default for mixed chat and workflow automation workloads.
- You can measure quality with your own benchmark and prompt set.
Choose Claude 3 Opus when...
- Your application includes visual reasoning and image understanding tasks.
- You process large documents or code repositories in a single prompt.
- You want a balanced default for mixed chat and workflow automation workloads.
Frequently Asked Questions
Practical checks before selecting a production model.
Which model is better for coding?
Coding preference depends on your stack and tool-calling needs. Compare the coding signal row, test with your repository tasks, and validate latency in your target region.
Which model is cheaper at scale?
Input and output token pricing can diverge by workload profile. Use the estimator with your monthly request count and token mix to get a realistic cost difference.
Are these official benchmark numbers?
Pricing is live from OpenRouter. Benchmark rows are ModelsAtlas metadata-based signals and should be treated as directional guidance, not official leaderboard scores.
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