When was GPT-5 released?

GPT-5 was released by OpenAI on Thursday, Aug 7 2025.

GPT-5 was built by OpenAI. Creators of ChatGPT and the GPT series of models. Pioneered large-scale language model research.

How much does GPT-5 cost?

GPT-5 costs $1.25 per million input tokens and $10.00 per million output tokens through the OpenAI API. Cached input is $0.125 per million tokens. Rates are pay-as-you-go API prices verified against OpenAI's published pricing on August 18, 2026.

What benchmark scores did GPT-5 get?

GPT-5 reports 1 tracked benchmark score — BullshitBench v2: 21%. Tracked scores may come from lab reports or independent benchmarks; source details accompany the benchmark data.

What is the context window of GPT-5?

GPT-5 has a context window of 400k. That is the maximum amount of input plus output the model can hold in a single request.

Is GPT-5 open source?

No. GPT-5 is a closed model. The weights are not published — it is available only through the provider's own API, apps, or partner platforms.

What came before and after GPT-5?

OpenAI's previous tracked release was gpt-oss-20b on Aug 5 2025, 2 days earlier. It was followed by GPT-5 mini on Aug 7 2025.

GPT-5

Released Aug 7 2025

GPT-5 is an AI model released by OpenAI on Thursday, Aug 7 2025, 2 days after gpt-oss-20b. It has a 400k token context window. Benchmark results (shown below) cover BullshitBench v2.

API pricing

Input: $1.25
Cached input: $0.125
Output: $10.00

Reasoning or thinking is supported.

USD per 1M tokens

Available from


Azure	—	—	$1.25	$10.00	400K
OpenAI	—	default	$1.25	$10.00	400K
Azure	swedencentral	—	$1.375	$11.00	400K

USD per 1M tokens

Benchmarks

BullshitBench v2

21%

#69 of 97

Compare GPT-5 with

GPT-5

Suggested comparisons

GPT-5vsGPT-6.1 Sol GPT-5vsClaude Haiku 5.5 GPT-5vsGemini 4 Argon GPT-5vsMuse Spark Open GPT-5vsGrok 4.7 GPT-5vsDeepSeek-V4.1-Flash-1017 GPT-5vsMistral Large 4 GPT-5vsKimi K3 GPT-5vsGLM-5.3-Flash GPT-5vsQwen3.8-Max-0902 GPT-5vsNemotron 3.5 Super VL

About

GPT-5, released August 7, 2025, collapsed OpenAI's confusing two-track lineup — GPT-4.1 for speed, o3 for reasoning — into a single system with a router that decides per request how much thinking a question deserves. It launched simultaneously in mini, nano, and Pro variants and became the default for ChatGPT's hundreds of millions of users, including the free tier.

The launch drew a famously mixed reception: benchmark gains over o3 were real but incremental, and the router initially frustrated users who wanted explicit model control. OpenAI iterated quickly — GPT-5.1 in November 2025 reworked the model's personality and adaptive reasoning, and the GPT-5.x line carried OpenAI's flagship branding for the next ten months, through GPT-5.6, until the GPT-6 generation opened with Astra in September 2026.

Frequently asked questions

: GPT-5 was released by OpenAI on Thursday, Aug 7 2025.
: GPT-5 was built by OpenAI. Creators of ChatGPT and the GPT series of models. Pioneered large-scale language model research.
: GPT-5 costs $1.25 per million input tokens and $10.00 per million output tokens through the OpenAI API. Cached input is $0.125 per million tokens. Rates are pay-as-you-go API prices verified against OpenAI's published pricing on August 18, 2026.
: GPT-5 reports 1 tracked benchmark score — BullshitBench v2: 21%. Tracked scores may come from lab reports or independent benchmarks; source details accompany the benchmark data.
: GPT-5 has a context window of 400k. That is the maximum amount of input plus output the model can hold in a single request.
: No. GPT-5 is a closed model. The weights are not published — it is available only through the provider's own API, apps, or partner platforms.
: OpenAI's previous tracked release was gpt-oss-20b on Aug 5 2025, 2 days earlier. It was followed by GPT-5 mini on Aug 7 2025.