Gemini Deep Research Preview vs GPT-4o Search Preview
Gemini Deep Research Preview (2026) and GPT-4o Search Preview (2025) are compact production models from Google DeepMind and OpenAI. Gemini Deep Research Preview ships a 1m-token context window, while GPT-4o Search Preview ships a 128k-token context window. On pricing, Gemini Deep Research Preview costs $2/1M input tokens versus $2.50/1M 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.
Gemini Deep Research Preview fits 8x more tokens; pick it for long-context work and GPT-4o Search Preview for tighter calls.
Decision scorecard
Local evidence first| Signal | Gemini Deep Research Preview | GPT-4o Search Preview |
|---|---|---|
| Best for | multimodal apps, tool-calling agents, and long-context analysis | general production evaluation |
| Decision fit | RAG, Agents, and Long context | RAG, Long context, and Classification |
| Context window | 1m | 128k |
| Cheapest output | $12/1M tokens | $10/1M tokens |
| Provider routes | 1 tracked | 1 tracked |
| Shared benchmarks | 0 shared | 0 shared |
Decision tradeoffs
- Gemini Deep Research Preview has the larger context window for long prompts, retrieval packs, or transcript analysis.
- Gemini Deep Research Preview uniquely exposes Vision, Multimodal, and Function calling in local model data.
- Local decision data tags Gemini Deep Research Preview for RAG, Agents, and Long context.
- GPT-4o Search Preview has the lower cheapest tracked output price at $10/1M tokens.
- Local decision data tags GPT-4o Search Preview for RAG, Long context, and Classification.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output route or tier on this page.
Gemini Deep Research Preview
$4,600
Cheapest tracked route/tier: Google AI Studio
GPT-4o Search Preview
$4,500
Cheapest tracked route/tier: OpenRouter
Estimated monthly gap: $100. Batch, cache, alternate speed tiers, and negotiated pricing are excluded from this local estimate.
Switch friction
- No overlapping tracked provider route is sourced for Gemini Deep Research Preview and GPT-4o Search Preview; plan for SDK, billing, or endpoint changes.
- GPT-4o Search Preview is $2/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
- Check replacement coverage for Vision, Multimodal, and Function calling before moving production traffic.
- No overlapping tracked provider route is sourced for GPT-4o Search Preview and Gemini Deep Research Preview; plan for SDK, billing, or endpoint changes.
- Gemini Deep Research Preview is $2/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
- Gemini Deep Research Preview adds Vision, Multimodal, and Function calling in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2026-04-21 | 2025-02-26 |
| Context window | 1m | 128k |
| Parameters | — | — |
| Architecture | Decoder Only | Decoder Only |
| License | Proprietary | Proprietary |
| Openness | Proprietary | Proprietary |
| Commercial use | Commercial use: conditional | Commercial use: conditional |
| Knowledge cutoff | 2025-01 | 2023-10 |
Pricing and availability
| Pricing attribute | Gemini Deep Research Preview | GPT-4o Search Preview |
|---|---|---|
| Input price | $2/1M tokens | $2.50/1M tokens |
| Output price | $12/1M tokens | $10/1M tokens |
| Providers |
Capabilities
| Capability | Gemini Deep Research Preview | GPT-4o Search Preview |
|---|---|---|
| Vision | Yes | No |
| Multimodal | Yes | No |
| Reasoning | No | No |
| Function calling | Yes | No |
| Tool use | Yes | No |
| 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: Gemini Deep Research Preview, multimodal input: Gemini Deep Research Preview, function calling: Gemini Deep Research Preview, and tool use: Gemini Deep Research Preview. 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, Gemini Deep Research Preview lists $2/1M input and $12/1M output tokens on the cheapest tracked provider, while GPT-4o Search Preview lists $2.50/1M input and $10/1M output tokens on the cheapest tracked provider. A 70/30 input-output blend puts GPT-4o Search Preview lower by about $0.25 per million blended tokens. Availability is 1 providers versus 1, so concentration risk also matters.
Choose Gemini Deep Research Preview when long-context analysis, 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.
FAQ
Which has a larger context window, Gemini Deep Research Preview or GPT-4o Search Preview?
Gemini Deep Research Preview supports 1m 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, Gemini Deep Research Preview or GPT-4o Search Preview?
GPT-4o Search Preview is cheaper on tracked token pricing. Gemini Deep Research Preview costs $2/1M input and $12/1M output tokens. GPT-4o Search Preview costs $2.50/1M input and $10/1M output tokens. Provider discounts or batch pricing can still change the final bill.
Is Gemini Deep Research Preview or GPT-4o Search Preview open source?
Gemini Deep Research Preview is listed under Proprietary. GPT-4o Search Preview 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, Gemini Deep Research Preview or GPT-4o Search Preview?
Gemini Deep Research Preview 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, Gemini Deep Research Preview or GPT-4o Search Preview?
Gemini Deep Research Preview 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 Gemini Deep Research Preview and GPT-4o Search Preview?
Gemini Deep Research Preview is available on Google AI Studio. GPT-4o Search Preview is available on OpenRouter. Provider coverage can affect latency, region availability, compliance posture, and fallback options. Use this as a quick comparison signal, then confirm the provider-specific limits before committing to production.
Continue comparing
Last reviewed: 2026-06-15. Data sourced from public model cards and provider documentation.