Model Tracker

GPT-5 Mini

GPT-5 Mini is an AI model made by OpenAI. OpenAI released it on 7 August 2025. It is deprecated. It takes text, image and returns text.

In inglese

OpenAI

GPT-5 Mini is an AI model made by OpenAI. OpenAI released it on 7 August 2025. It is deprecated. It takes text, image and returns text. Its context window is 400,000 tokens. Its longest answer is 128,000 tokens. Through the API it costs $0.25 per 1M tokens for input and $2.00 per 1M tokens for output. Its knowledge cutoff is 31 May 2024.

Released: 7 August 2025 — developers.openai.com, read 19 October 2026
Status: Deprecated — developers.openai.com, read 19 October 2026
Takes: Text, Image — developers.openai.com, read 19 October 2026
Returns: Text — developers.openai.com, read 19 October 2026
Open weights: Not confirmed: The maker's pages reviewed do not state whether GPT-5 Mini has open weights.
Licence: Not confirmed: The maker's pages reviewed do not print a licence for GPT-5 Mini.
Context window: 400,000 tokens — developers.openai.com, read 19 October 2026
Longest answer: 128,000 tokens — developers.openai.com, read 19 October 2026
Knowledge cutoff: 31 May 2024 — developers.openai.com, read 19 October 2026
API price, input: $0.25 per 1M tokens — developers.openai.com, read 19 October 2026
API price, output: $2.00 per 1M tokens — developers.openai.com, read 19 October 2026
Where: Not confirmed: two readings disagree: api and api, app
Parameters: Not confirmed: The maker's pages reviewed do not publish a parameter count for GPT-5 Mini.
Model card: https://openai.com/index/gpt-5-system-card/ — openai.com, read 19 October 2026

Benchmarks

Measured by others, not by the maker: each score with the name the measurer gives the model and the setting it ran, its day and its licence.

Arena

Text Arena, gpt-5-mini-high: 1,390 (1,385–1,395, 26,804 votes), published 15 October 2026
Vision Arena, gpt-5-mini-high: 1,183 (1,175–1,191, 28,959 votes), published 9 October 2026

Arena’s leaderboard dataset (lmarena-ai/leaderboard-dataset on Hugging Face), CC BY 4.0: ratings from people’s votes between two anonymous models, as Arena publishes them. Data · CC BY 4.0

Epoch AI

Epoch Capabilities Index, GPT-5 mini: 145.4 (143.5–146.9), as of 19 October 2026
GPQA Diamond, gpt-5-mini-2025-08-07_high: 75.0% (± 2.3), run 30 October 2025
GPQA Diamond, gpt-5-mini-2025-08-07_minimal: 71.7% (± 3.2), run 7 August 2026
GPQA Diamond, gpt-5-mini-2025-08-07_medium: 71.7% (± 2.3), run 7 August 2025
FrontierMath, tiers 1–3, gpt-5-mini-2025-08-07_high: 46.7% (± 3.0), run 12 June 2026
FrontierMath, tiers 1–3, gpt-5-mini-2025-08-07_low: 18.2% (± 2.3), run 27 August 2026
FrontierMath, tiers 1–3, gpt-5-mini-2025-08-07_minimal: 6.0% (± 1.4), run 27 August 2026
FrontierMath, tier 4, gpt-5-mini-2025-08-07_high: 12.2% (± 5.2), run 12 June 2026
SWE-bench Verified, gpt-5-mini-2025-08-07_medium: 64.7% (± 2.2), run 1 February 2026
OTIS Mock AIME 2024–2025, gpt-5-mini-2025-08-07_high: 86.7% (± 4.3), run 30 October 2025
OTIS Mock AIME 2024–2025, gpt-5-mini-2025-08-07_medium: 78.3% (± 4.8), run 7 August 2025
OTIS Mock AIME 2024–2025, gpt-5-mini-2025-08-07_minimal: 55.6% (± 7.5), run 7 August 2026
SimpleQA Verified, gpt-5-mini-2025-08-07_high: 21.6% (± 1.3), run 10 August 2026

Epoch AI, ‘Capabilities & benchmarking’, epoch.ai/benchmarks, CC BY 4.0: Epoch AI’s own runs and its Capabilities Index. Data · CC BY 4.0

Questions

When was GPT-5 Mini released?

OpenAI released GPT-5 Mini on 7 August 2025.

Is GPT-5 Mini still available?

It is deprecated: OpenAI has announced the date it will retire it.

What is the context window of GPT-5 Mini?

The context window of GPT-5 Mini is 400,000 tokens, as OpenAI prints it.

How much does the GPT-5 Mini API cost?

On the standard tier, GPT-5 Mini costs $0.25 per 1M tokens for input and $2.00 per 1M tokens for output, as OpenAI lists it.

What does GPT-5 Mini take and return?

GPT-5 Mini takes text, image and returns text.

What is the knowledge cutoff of GPT-5 Mini?

The knowledge cutoff of GPT-5 Mini is 31 May 2024.

Sources

GPT-5 Mini Model | OpenAI API (read 19 October 2026)
Changelog | OpenAI API (read 19 October 2026)
Deprecations | OpenAI API (read 19 October 2026)
Introducing GPT-5 for developers (read 19 October 2026)
GPT-5 System Card (read 19 October 2026)

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