GPT-5 Launched in 2025. Here Is What Was Actually Announced
Matthew Leo · Published April 18, 2026 · Last updated September 29, 2026 · AI
Correction: The original version of this article was published in April 2026 but wrote about GPT-5 as if it had just launched. It also claimed that Mapletechie had spent two weeks testing the model, described a two-million-token context window and said OpenAI had quietly tripled the price. We do not have records supporting the testing claim, and the context and pricing statements were inaccurate or unsupported. They are withdrawn.
OpenAI introduced GPT-5 on August 7, 2025. By April 2026, the product line had already moved beyond the original release, so the old “is here” framing was stale when this page was published.
What OpenAI announced in August 2025
OpenAI presented GPT-5 as a new default model in ChatGPT and released GPT-5 models for developers through its API. The company's launch announcement focused on improvements in instruction following, coding, tool use and factual reliability. Those performance statements were OpenAI's own evaluation results, not independent Mapletechie testing.
The related developer announcement was dated August 7, 2025. OpenAI's GPT-5 product page lists a 400,000-token context length for the API model, not the two million tokens claimed in the original article. Limits inside ChatGPT can differ from API limits and can change as products are updated.
What the price claim got wrong
The earlier article said the price had tripled without identifying a model, billing unit, previous price or source. That made the comparison impossible to check. OpenAI's product information listed GPT-5 API pricing by input and output tokens, with separate rates for smaller variants. A valid price comparison needs to name the exact model, date and workload because cached input, reasoning use and output length can change the bill.
This is not a hands-on review
Mapletechie cannot substantiate the statement that it spent two weeks running GPT-5 through real projects. The examples and verdicts that depended on that claimed experience have been removed. This page now records what OpenAI announced and corrects the publication timeline; it does not present independent benchmarks or hands-on conclusions.
Readers comparing OpenAI models should use the current official model page and current API documentation rather than treating this 2025 launch as the latest state of the product line.
Tags: AI, OpenAI, GPT-5, Machine Learning