o3 vs Grok 3

Compare o3 and Grok 3. Find out which one is better for your use case.

Model Comparison

Featureo3Grok 3
ProviderOpenAIxAI
Model Typetexttext
Context Window200,000 tokens131,072 tokens
Input Cost$2.00 / 1M tokens$3.00 / 1M tokens
Output Cost$8.00 / 1M tokens$15.00 / 1M tokens

Strengths & Best Use Cases

o3

1. Advanced reasoning capability

  • Designed for multi-step thinking across text, code, and visual inputs.
  • Excels at math, science, logic puzzles, and complex analytical workflows.

2. Strong performance across domains

  • Highly capable in technical writing, data analysis, and structured problem-solving.
  • Useful for research, engineering tasks, and intricate instruction-following.

3. Visual reasoning support

  • Accepts image inputs, enabling tasks such as diagram analysis, chart interpretation, and visual logic assessments.

4. High output capacity

  • Up to 100,000 output tokens, supporting long-form content, technical breakdowns, and multi-part solutions.

5. Excellent instruction following

  • Produces detailed, step-by-step responses for tasks requiring precision and clarity.
  • Ideal for educational explanations, system design reasoning, and code walkthroughs.

6. Large 200K context window

  • Handles long documents, multi-file reasoning, or extended conversations with minimal loss of context.

7. Broad API support

  • Works with Chat Completions, Responses, Realtime, Assistants, Batch, Embeddings, Image Generation, and more.
  • Supports streaming and function calling for advanced workflows.

8. Positioned as a legacy reasoning model

  • Remains extremely capable but formally succeeded by GPT-5, which offers stronger reasoning and performance.

Grok 3

1. Strong enterprise-grade reasoning

  • Built for deep logical reasoning, structured decision-making, and multi-step analysis.
  • Performs exceptionally in domains requiring precision: law, finance, healthcare, and STEM.

2. Excellent at data extraction and summarization

  • Optimized for structured extraction from documents, PDFs, tables, and complex text.
  • Ideal for enterprise workflows like reporting, compliance automation, or knowledge mining.

3. High-performance coding capabilities

  • Excels at code generation, debugging, refactoring, and explaining code.
  • Competitive with top-tier coding models for multi-file, long-context code reasoning.

4. Supports function calling and structured outputs

  • Integrates cleanly with agent frameworks and external tools.
  • Predictable, schema-aligned responses suitable for production systems.

5. Large 131K context window

  • Handles long documents, transcripts, contracts, codebases, or multi-document tasks.
  • Useful for ingesting highly technical materials in one pass.

6. Efficient cost structure with cached token pricing

  • Cached inputs: only $0.75 / 1M tokens, enabling large-scale systems.
  • Encourages reuse for powerful retrieval-augmented workflows.

7. Enterprise reliability and availability

  • Supported across multiple regions (us-east-1, eu-west-1).
  • Consistent rate limits: 600 requests/min.
  • Suitable for production-grade apps with stability requirements.

8. Supports advanced search capabilities

  • Optional Live Search add-on for real-time knowledge retrieval.
  • Pricing: $25 per 1K sources.

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