GPT-4o-mini Search Preview vs o3 Deep Research
GPT-4o-mini Search Preview (2025) and o3 Deep Research (2025) are frontier reasoning models from OpenAI. GPT-4o-mini Search Preview ships a 128k-token context window, while o3 Deep Research ships a 200k-token context window. On pricing, GPT-4o-mini Search Preview costs $0.15/1M input tokens versus $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.
GPT-4o-mini Search Preview is ~6567% cheaper at $0.15/1M; pay for o3 Deep Research only for reasoning depth.
Decision scorecard
Local evidence first| Signal | GPT-4o-mini Search Preview | o3 Deep Research |
|---|---|---|
| Best for | provider-routed production | reasoning-heavy apps, multimodal apps, and tool-calling agents |
| Decision fit | RAG, Long context, and Classification | RAG, Agents, and Long context |
| Context window | 128k | 200k |
| Cheapest output | $0.60/1M tokens | $40/1M tokens |
| Provider routes | 2 tracked | 1 tracked |
| Shared benchmarks | 0 shared | 0 shared |
Decision tradeoffs
- GPT-4o-mini Search Preview has the lower cheapest tracked output price at $0.60/1M tokens.
- GPT-4o-mini Search Preview has broader tracked provider coverage for fallback and procurement flexibility.
- Local decision data tags GPT-4o-mini Search Preview for RAG, Long context, and Classification.
- o3 Deep Research has the larger context window for long prompts, retrieval packs, or transcript analysis.
- o3 Deep Research uniquely exposes Vision, Multimodal, and Reasoning in local model data.
- Local decision data tags o3 Deep Research for RAG, Agents, and Long context.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output route or tier on this page.
GPT-4o-mini Search Preview
$270
Cheapest tracked route/tier: OpenRouter
o3 Deep Research
$18,000
Cheapest tracked route/tier: Vercel AI Gateway
Estimated monthly gap: $17,730. Batch, cache, alternate speed tiers, and negotiated pricing are excluded from this local estimate.
Switch friction
- Provider overlap exists on Vercel AI Gateway; start route-level A/B tests there.
- o3 Deep Research is $39.40/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
- o3 Deep Research adds Vision, Multimodal, and Reasoning in local capability data.
- Provider overlap exists on Vercel AI Gateway; start route-level A/B tests there.
- GPT-4o-mini Search Preview is $39.40/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
- Check replacement coverage for Vision, Multimodal, and Reasoning before moving production traffic.
Specs
| Specification | ||
|---|---|---|
| Released | 2025-02-26 | 2025-10-10 |
| Context window | 128k | 200k |
| Parameters | — | — |
| Architecture | Decoder Only | Decoder Only |
| License | Proprietary | Proprietary |
| Openness | Proprietary | Proprietary |
| Commercial use | Commercial use: conditional | Commercial use: conditional |
| Knowledge cutoff | 2023-10 | 2024-06 |
Pricing and availability
| Pricing attribute | GPT-4o-mini Search Preview | o3 Deep Research |
|---|---|---|
| Input price | $0.15/1M tokens | $10/1M tokens |
| Output price | $0.60/1M tokens | $40/1M tokens |
| Providers |
Capabilities
| Capability | GPT-4o-mini Search Preview | o3 Deep Research |
|---|---|---|
| Vision | No | Yes |
| Multimodal | No | Yes |
| Reasoning | No | Yes |
| Function calling | No | Yes |
| Tool use | No | Yes |
| Structured outputs | Yes | Yes |
| Code execution | No | No |
| IDE integration | No | No |
| Computer use | No | No |
| Parallel agents | No | No |
Benchmarks
No shared benchmark scores are currently available for this pair.
Deep dive
The capability footprint differs most on vision: o3 Deep Research, multimodal input: o3 Deep Research, reasoning mode: o3 Deep Research, function calling: o3 Deep Research, and tool use: o3 Deep Research. 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, GPT-4o-mini Search Preview lists $0.15/1M input and $0.60/1M output tokens on the cheapest tracked provider, while o3 Deep Research lists $10/1M input and $40/1M output tokens on the cheapest tracked provider. A 70/30 input-output blend puts GPT-4o-mini Search Preview lower by about $18.71 per million blended tokens. Availability is 2 providers versus 1, so concentration risk also matters.
Choose GPT-4o-mini Search Preview when provider fit, lower input-token cost, and broader provider choice are central to the workload. Choose o3 Deep Research when reasoning depth and larger context windows 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.
FAQ
Which has a larger context window, GPT-4o-mini Search Preview or o3 Deep Research?
o3 Deep Research supports 200k tokens, while GPT-4o-mini 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, GPT-4o-mini Search Preview or o3 Deep Research?
GPT-4o-mini Search Preview is cheaper on tracked token pricing. GPT-4o-mini Search Preview costs $0.15/1M input and $0.60/1M output tokens. o3 Deep Research costs $10/1M input and $40/1M output tokens. Provider discounts or batch pricing can still change the final bill.
Is GPT-4o-mini Search Preview or o3 Deep Research open source?
GPT-4o-mini Search Preview is listed under Proprietary. o3 Deep Research is listed under Proprietary. 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, GPT-4o-mini Search Preview or o3 Deep Research?
o3 Deep Research 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 multimodal input, GPT-4o-mini Search Preview or o3 Deep Research?
o3 Deep Research has the clearer documented multimodal input signal in this comparison. If multimodal input is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Where can I run GPT-4o-mini Search Preview and o3 Deep Research?
GPT-4o-mini Search Preview is available on OpenRouter and Vercel AI Gateway. o3 Deep Research is available on Vercel AI Gateway. Provider coverage can affect latency, region availability, compliance posture, and fallback options.
Continue comparing
Last reviewed: 2026-06-15. Data sourced from public model cards and provider documentation.