Claude 3.5 Haiku vs GPT-4o Search Preview
Claude 3.5 Haiku (2024) and GPT-4o Search Preview (2025) are frontier reasoning models from Anthropic and OpenAI. Claude 3.5 Haiku ships a 200k-token context window, while GPT-4o Search Preview ships a 128K-token context window. On pricing, Claude 3.5 Haiku costs $0.8/1M input tokens versus $2.5/1M for the alternative. This comparison covers specs, pricing, capabilities, benchmarks, provider availability, and production fit.
Claude 3.5 Haiku is ~213% cheaper at $0.8/1M; pay for GPT-4o Search Preview only for provider fit.
Specs
| Specification | ||
|---|---|---|
| Released | 2024-10-22 | 2025-02-26 |
| Context window | 200k | 128K |
| Parameters | — | — |
| Architecture | decoder only | decoder only |
| License | Unknown | Unknown |
| Knowledge cutoff | - | - |
Pricing and availability
| Pricing attribute | Claude 3.5 Haiku | GPT-4o Search Preview |
|---|---|---|
| Input price | $0.8/1M tokens | $2.5/1M tokens |
| Output price | $4/1M tokens | $10/1M tokens |
| Providers |
Capabilities
| Capability | Claude 3.5 Haiku | GPT-4o Search Preview |
|---|---|---|
| Vision | Yes | No |
| Multimodal | No | No |
| Reasoning | Yes | No |
| Function calling | No | No |
| Tool use | No | No |
| Structured outputs | Yes | Yes |
| Code execution | Yes | No |
Benchmarks
No shared benchmark rows are currently sourced for this pair.
Deep dive
The capability footprint differs most on vision: Claude 3.5 Haiku, reasoning mode: Claude 3.5 Haiku, and code execution: Claude 3.5 Haiku. Both models share structured outputs, so the practical split is not just feature count. Use those differences to decide whether the page is about raw model quality, agentic coding support, multimodal ingestion, or predictable structured API behavior.
For cost, Claude 3.5 Haiku lists $0.8/1M input and $4/1M output tokens, while GPT-4o Search Preview lists $2.5/1M input and $10/1M output tokens on the cheapest tracked provider. A 70/30 input-output blend puts Claude 3.5 Haiku lower by about $2.99 per million blended tokens. Availability is 5 providers versus 1, so concentration risk also matters.
Choose Claude 3.5 Haiku when coding workflow support, larger context windows, and lower input-token cost are central to the workload. Choose GPT-4o Search Preview when provider fit are more important. For production, rerun your own prompts through the exact provider, region, and tool stack you plan to ship. This keeps the decision grounded in measurable tradeoffs instead of brand-level assumptions. It also helps separate model capability from provider packaging, which can change cost and latency.
FAQ
Which has a larger context window, Claude 3.5 Haiku or GPT-4o Search Preview?
Claude 3.5 Haiku supports 200k tokens, while GPT-4o Search Preview supports 128K tokens. That gap matters most for long documents, large codebases, retrieval-heavy agents, and conversations where earlier context must remain visible.
Which is cheaper, Claude 3.5 Haiku or GPT-4o Search Preview?
Claude 3.5 Haiku is cheaper on tracked token pricing. Claude 3.5 Haiku costs $0.8/1M input and $4/1M output tokens. GPT-4o Search Preview costs $2.5/1M input and $10/1M output tokens. Provider discounts or batch pricing can still change the final bill.
Is Claude 3.5 Haiku or GPT-4o Search Preview open source?
Claude 3.5 Haiku is listed under Unknown. GPT-4o Search Preview is listed under Unknown. License labels affect whether you can self-host, redistribute weights, or rely only on hosted APIs, so confirm the upstream license before deployment.
Which is better for vision, Claude 3.5 Haiku or GPT-4o Search Preview?
Claude 3.5 Haiku has the clearer documented vision signal in this comparison. If vision is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Which is better for reasoning mode, Claude 3.5 Haiku or GPT-4o Search Preview?
Claude 3.5 Haiku has the clearer documented reasoning mode signal in this comparison. If reasoning mode is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Where can I run Claude 3.5 Haiku and GPT-4o Search Preview?
Claude 3.5 Haiku is available on Anthropic, OpenRouter, AWS Bedrock, GCP Vertex AI, and Replicate API. GPT-4o Search Preview is available on OpenRouter. Provider coverage can affect latency, region availability, compliance posture, and fallback options.
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Last reviewed: 2026-05-11. Data sourced from public model cards and provider documentation.