Claude 3.5 Haiku vs o3 Mini
Claude 3.5 Haiku (2024) and o3 Mini (2025) are frontier-tier reasoning models from Anthropic and OpenAI. Claude 3.5 Haiku ships a 200k-token context window, while o3 Mini ships a 200k-token context window. On pricing, Claude 3.5 Haiku costs $0.80/1M input tokens versus $1.10/1M 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.
o3 Mini is safer overall; choose Claude 3.5 Haiku when coding workflow support matters.
Decision scorecard
Local evidence first| Signal | Claude 3.5 Haiku | o3 Mini |
|---|---|---|
| Best for | reasoning-heavy apps, multimodal apps, and provider-routed production | reasoning-heavy apps, tool-calling agents, and provider-routed production |
| Decision fit | Coding, RAG, and Agents | Coding, RAG, and Agents |
| Context window | 200k | 200k |
| Cheapest output | $4/1M tokens | $4.40/1M tokens |
| Provider routes | 6 tracked | 4 tracked |
| Shared benchmarks | 0 shared | 0 shared |
Decision tradeoffs
- Claude 3.5 Haiku has the lower cheapest tracked output price at $4/1M tokens.
- Claude 3.5 Haiku has broader tracked provider coverage for fallback and route flexibility.
- Claude 3.5 Haiku uniquely exposes Vision in local model data.
- Local decision data tags Claude 3.5 Haiku for Coding, RAG, and Agents.
- o3 Mini uniquely exposes JSON / Tool use in local model data.
- Local decision data tags o3 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
o3 Mini
$1,980
Cheapest tracked route/tier: OpenRouter
Estimated monthly gap: $340. Batch, cache, alternate speed tiers, and negotiated pricing are excluded from this local estimate.
Switch friction
- Provider overlap exists on OpenRouter and Vercel AI Gateway; start route-level A/B tests there.
- o3 Mini is $0.40/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
- Check replacement coverage for Vision before moving production traffic.
- o3 Mini adds JSON / Tool use in local capability data.
- Provider overlap exists on OpenRouter and Vercel AI Gateway; start route-level A/B tests there.
- Claude 3.5 Haiku is $0.40/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
- Check replacement coverage for JSON / Tool use before moving production traffic.
- Claude 3.5 Haiku adds Vision in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2024-10-22 | 2025-01-31 |
| 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 | - | 2025-04 |
Pricing and availability
| Pricing attribute | Claude 3.5 Haiku | o3 Mini |
|---|---|---|
| Input price | $0.80/1M tokens | $1.10/1M tokens |
| Output price | $4/1M tokens | $4.40/1M tokens |
| Providers |
Capabilities
| Capability | Claude 3.5 Haiku | o3 Mini |
|---|---|---|
| Vision | Yes | No |
| Multimodal | No | No |
| 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.