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GPT-5 vs o3-mini

GPT-5 and o3-mini are both Conversational AI tools in our directory. This side-by-side comparison covers pricing, editorial scores, supported platforms, key features and open-source status so you can decide which one fits your needs.

Side-by-side comparison

AttributeGPT-5o3-mini
Product statusActiveActive
VendorOpenAIOpenAI
Rating★ 4.7★ 4.6
PricingPay-as-you-goPay-as-you-go
PlatformsAPIAPI
Key featuresConfigurable minimal/low/medium/high reasoning effort, Text and image input; text output, Function calling and structured outputsText input and output, 200K context; up to 100K output tokens, Function calling and structured outputs
Headquarters——
Launched2025—
Open sourceNoNo

Key differences

  • GPT-5 carries the higher editorial score (4.7★ vs 4.6★).
  • Both GPT-5 and o3-mini use a Pay-as-you-go model.
  • GPT-5 runs on API; o3-mini runs on API.

GPT-5 and o3-mini at a glance

GPT-5

OpenAI

OpenAI's original GPT-5 API reasoning model with configurable effort, text/image input and text output. The gpt-5-2025-08-07 snapshot is deprecated with API removal scheduled for December 11, 2026.

Rating
4.7★
Pricing
Pay-as-you-go

Editorial verdict

A legacy API model with a published retirement deadline. Existing users can use this record to plan migration; new long-lived deployments should evaluate supported models and verify account access.

Strengths

  • Explicit reasoning-effort settings
  • Documented function calls and structured outputs
  • Snapshot ID helps track a legacy integration

Key features

  • Configurable minimal/low/medium/high reasoning effort
  • Text and image input; text output
  • Function calling and structured outputs
  • Streaming responses
  • Original snapshot scheduled to retire December 11, 2026

Best for

  • Maintaining an existing coding or analysis integration during migration
  • Comparing structured outputs and tool behavior against a replacement
Read the full GPT-5 review →

o3-mini

OpenAI

OpenAI's deprecated text reasoning API model; o3-mini and its 2025-01-31 snapshot are scheduled to shut down on 2026-10-23.

Rating
4.6★
Pricing
Pay-as-you-go

Editorial verdict

As of 2026-10-15, o3-mini is deprecated with shutdown scheduled for 2026-10-23. Prioritize migration of existing integrations and use a supported model for new projects.

Strengths

  • Documented structured-output and function interfaces
  • Dated snapshot and shutdown schedule are explicit

Key features

  • Text input and output
  • 200K context; up to 100K output tokens
  • Function calling and structured outputs
  • No image, audio or video input

Best for

  • Inventorying an existing o3-mini integration
  • Preparing schema and tool cases for a replacement
  • Interpreting earlier token-cost records
Read the full o3-mini review →

Feature overlap

  • Both tools offer: Function calling and structured outputs
  • GPT-5 also lists: Configurable minimal/low/medium/high reasoning effort, Text and image input; text output, Streaming responses, Original snapshot scheduled to retire December 11, 2026
  • o3-mini also lists: Text input and output, 200K context; up to 100K output tokens, No image, audio or video input

Frequently asked questions

Is GPT-5 or o3-mini better?

By editorial score, GPT-5 scores higher (4.7★ vs 4.6★). Both are capable Conversational AI tools, so review the feature comparison for your use case.

Which is cheaper, GPT-5 or o3-mini?

Both GPT-5 and o3-mini use a Pay-as-you-go pricing model.

Are GPT-5 and o3-mini open source?

No — neither GPT-5 nor o3-mini is open source.

What platforms do GPT-5 and o3-mini support?

GPT-5 supports API; o3-mini supports API.

What are the main features of GPT-5 and o3-mini?

GPT-5: Configurable minimal/low/medium/high reasoning effort, Text and image input; text output, Function calling and structured outputs, Streaming responses, Original snapshot scheduled to retire December 11, 2026. o3-mini: Text input and output, 200K context; up to 100K output tokens, Function calling and structured outputs, No image, audio or video input.

Visit GPT-5 →Visit o3-mini →

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