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LLM Comparisono4-miniClaude 4.5 Haiku

o4-mini vs Claude 4.5 Haiku

Compare o4-mini and Claude 4.5 Haiku. Build AI products powered by either model on Appaca.

Model Comparison

Featureo4-miniClaude 4.5 Haiku
ProviderOpenAIAnthropic
Model Typetexttext
Context Window200,000 tokens200,000 tokens
Input Cost
$1.10/ 1M tokens
$1.00/ 1M tokens
Output Cost
$4.40/ 1M tokens
$5.00/ 1M tokens

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Strengths & Best Use Cases

o4-mini

OpenAI

1. Fast and efficient reasoning

  • Provides strong reasoning capabilities with significantly lower latency and cost compared to larger o-series models.
  • Ideal for lightweight reasoning tasks, logic steps, and quick multi-step thinking.

2. Optimized for coding tasks

  • Performs exceptionally well in code generation, debugging, and explanation.
  • Useful for IDE integrations, coding assistants, and developer tools with tight latency budgets.

3. Strong visual reasoning

  • Accepts image inputs for tasks such as diagram interpretation, charts, UI analysis, and visual logic.
  • Great for hybrid text-image reasoning flows.

4. Large 200K-token context window

  • Capable of processing long documents, multi-file codebases, or extended analysis.
  • Reduces need for chunking or external retrieval pipelines.

5. High 100K-token output limit

  • Supports lengthy reasoning sequences, full codebase explanations, or multi-section documents.

6. Broad API compatibility

  • Available in Chat Completions, Responses, Realtime, Assistants, Batch, Embeddings, and Image workflows.
  • Supports streaming, function calling, structured outputs, and fine-tuning.

7. Cost-efficient for production

  • Lower input/output pricing makes it suitable for large-scale deployments, SaaS products, and recurring tasks.

8. Succeeded by GPT-5 mini

  • GPT-5 mini offers improved speed, reasoning power, and pricing, but o4-mini remains a strong option for cost-sensitive workloads.

Claude 4.5 Haiku

Anthropic

1. Frontier-level coding at small-model speed

  • Similar coding performance to Claude Sonnet 4 at one-third the cost.
  • Runs 4-5x faster than Sonnet 4.5 for many tasks.
  • Ideal for real-time pair programming, prototyping, and rapid iteration.

2. Excellent computer-use abilities

  • Surpasses Claude Sonnet 4 in certain computer-control tasks.
  • Great for agents requiring low-latency tool use (Chrome automation, coding agents, etc.).

3. Perfect for real-time, low-latency applications

  • Chat assistants
  • Customer support agents
  • Interactive development loops
  • Multi-agent orchestration

4. Works seamlessly with Sonnet 4.5 in hybrid agent setups

  • Sonnet 4.5 plans complex workflows.
  • Haiku 4.5 executes subtasks in parallel for speed and cost-efficiency.

5. High alignment & safest Claude model by metric

  • Lower misaligned behavior rates than Haiku 3.5, Sonnet 4.5, and Opus 4.1.
  • Limited CBRN risk → released under AI Safety Level 2 (ASL-2).

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