Claude 3.5 Haiku vs o4-mini
Claude 3.5 Haiku (2024) and o4-mini (2025) are frontier-tier reasoning models from Anthropic and OpenAI. Claude 3.5 Haiku ships a 200k-token context window, while o4-mini ships a 200k-token context window. On pricing, Claude 3.5 Haiku costs $0.80/1M input tokens versus $1/1M for the alternative. This comparison covers specs, pricing, API access, capabilities, benchmarks, input and output token costs, and production fit for coding and agent workloads.
o4-mini is safer overall; choose Claude 3.5 Haiku when coding workflow support matters.
Decision scorecard
Local evidence first| Signal | Claude 3.5 Haiku | o4-mini |
|---|---|---|
| Best for | reasoning-heavy apps, multimodal apps, and provider-routed production | reasoning-heavy apps, multimodal apps, and tool-calling agents |
| Decision fit | Coding, RAG, and Agents | Coding, RAG, and Agents |
| Context window | 200k | 200k |
| Cheapest output | $4/1M tokens | $4/1M tokens |
| Provider routes | 6 tracked | 4 tracked |
| Shared benchmarks | 0 shared | 0 shared |
Decision tradeoffs
- Claude 3.5 Haiku has broader tracked provider coverage for fallback and route flexibility.
- Local decision data tags Claude 3.5 Haiku for Coding, RAG, and Agents.
- o4-mini uniquely exposes Multimodal and JSON / Tool use in local model data.
- Local decision data tags o4-mini for Coding, RAG, and Agents.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output route or tier on this page.
Claude 3.5 Haiku
$1,640
Cheapest tracked route/tier: Anthropic
o4-mini
$1,800
Cheapest tracked route/tier: Replicate API
Estimated monthly gap: $160. Batch, cache, alternate speed tiers, and negotiated pricing are excluded from this local estimate.
Switch friction
- Provider overlap exists on OpenRouter, Replicate API, and Vercel AI Gateway; start route-level A/B tests there.
- Cheapest tracked output pricing is tied, so migration risk shifts to quality, latency, and provider packaging.
- o4-mini adds Multimodal and JSON / Tool use in local capability data.
- Provider overlap exists on OpenRouter, Replicate API, and Vercel AI Gateway; start route-level A/B tests there.
- Cheapest tracked output pricing is tied, so migration risk shifts to quality, latency, and provider packaging.
- Check replacement coverage for Multimodal and JSON / Tool use before moving production traffic.
Specs
| Specification | ||
|---|---|---|
| Released | 2024-10-22 | 2025-04-16 |
| Context window | 200k | 200k |
| Parameters | — | — |
| Architecture | Decoder Only | Decoder Only |
| License | Proprietary | Proprietary |
| Openness | Proprietary | Proprietary |
| Weights | Not released | Not released |
| Code | Unknown | Unknown |
| Commercial use | Commercial use: conditional | Commercial use: conditional |
| Knowledge cutoff | - | 2025-08 |
Pricing and availability
| Pricing attribute | Claude 3.5 Haiku | o4-mini |
|---|---|---|
| Input price | $0.80/1M tokens | $1/1M tokens |
| Output price | $4/1M tokens | $4/1M tokens |
| Providers |
Capabilities
| Capability | Claude 3.5 Haiku | o4-mini |
|---|---|---|
| Vision | Yes | Yes |
| Multimodal | No | Yes |
| Reasoning | Yes | Yes |
| JSON / Tool use | No | Yes |
| Structured outputs | Yes | Yes |
| Code execution | Yes | Yes |
| IDE integration | No | No |
| Computer use | No | No |
| Parallel agents | No | No |
Benchmarks
No shared benchmark scores are currently available for this pair.
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Last reviewed: 2026-07-26. Data sourced from public model cards and provider documentation.