o4-mini vs Claude 4.5 Haiku
Compare pricing, context windows, and strengths for o4-mini by OpenAI and Claude 4.5 Haiku by Anthropic - and see how to put either to work in Appaca.
o4-mini
A fast, cost-efficient small reasoning model optimized for coding and visual tasks; succeeded by GPT-5 mini.
View o4-miniClaude 4.5 Haiku
A fast, small model delivering near-frontier coding and computer-use performance at ultra-low cost with exceptional speed and strong safety.
View Claude 4.5 Haikuo4-mini vs Claude 4.5 Haiku at a glance
Specs and pricing side by side, from the Appaca AI models directory.
| Spec | o4-mini | Claude 4.5 Haiku |
|---|---|---|
| Provider | OpenAI | Anthropic |
| Model type | Text | Text |
| Context window | 200K tokens | 200K tokens |
| Input price | $1.1 / 1M tokens | $1 / 1M tokens |
| Output price | $4.4 / 1M tokens | $5 / 1M tokens |
| Status | Current | Current |
How o4-mini and Claude 4.5 Haiku differ
What the numbers mean in practice when choosing between o4-mini and Claude 4.5 Haiku.
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Claude 4.5 Haiku is 9% cheaper on input tokens ($1 vs $1.1 per million), which adds up quickly in document-heavy workloads.
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o4-mini is 12% cheaper on output tokens ($4.4 vs $5 per million) - the bigger factor for tools that generate long documents.
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Both models offer the same 200K tokens context window.
Strengths side by side
Where each model shines, according to benchmarks and provider positioning.
o4-mini
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
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).
Use o4-mini or Claude 4.5 Haiku - or both
Appaca is the AI workspace for operators. Build internal tools and AI co-workers powered by o4-mini or Claude 4.5 Haiku - connected to your real data and ready for your whole team. No code, no deployment.
Describe it, and it's built
Tell the Appaca agent the internal tool you need and it builds a working app powered by o4-mini or Claude 4.5 Haiku. No code, no API keys, no deployment.
Switch models without rebuilding
Start on o4-mini, test the same tool on Claude 4.5 Haiku, and keep whichever performs better - the rest of your app stays exactly as it is.
Automated for the whole team
Schedule tools to run on autopilot - daily digests, weekly reports, real-time triggers - and share them with your whole team from one workspace.
Describe it, and it's built
Tell the Appaca agent what your team needs and it builds a working app powered by o4-mini or Claude 4.5 Haiku - connected to the tools you already use.
Related comparisons
See how o4-mini and Claude 4.5 Haiku stack up against other models in the directory.
FAQs
o4-mini is generally cheaper: $1.1 input / $4.4 output per million tokens, versus $1 / $5 for Claude 4.5 Haiku. Actual cost depends on how many tokens your workload reads and writes.
They are equal: both o4-mini and Claude 4.5 Haiku support a 200K tokens context window.
It depends on the job. Compare the pricing, context window, and strengths above against your workload - and remember the choice isn't permanent. In Appaca you can build a tool on o4-mini, test the same tool on Claude 4.5 Haiku, and switch at any time without rebuilding anything.
Yes. Appaca is a no-code AI workspace: describe the internal tool your team needs and the Appaca agent builds it as a working app powered by o4-mini, Claude 4.5 Haiku, or any other model in the directory - with a built-in database, team access, and integrations. No API keys to wire up and nothing to deploy.
Build AI tools with o4-mini or Claude 4.5 Haiku
Describe the tool your team needs and get a working app powered by the model you choose - with a built-in database, team access, and integrations. No code, no deployment.