GPT-5 is OpenAI’s most capable large language model to date. Launched on August 7, 2025, it introduces a unified architecture that intelligently routes between a fast everyday model, a deeper “thinking” reasoning engine, and a real-time decision layer that knows exactly when to go deep.
With a massive 400,000-token context window, native vision support, and major leaps in instruction following, tool use, and factual accuracy. It crushes benchmarks in coding, math, scientific reasoning, and long-context analysis while staying fast and cost-effective for high-volume workloads.
GPT-5 is built on an advanced transformer framework with optimized attention mechanisms and energy-efficient Mixture of Experts (MoE) layers. Recursive training and enhanced context management enable dynamic focus on salient information, improving both computational speed and accuracy over prior generation models.
GPT-5 automatically decides when to use “thinking” mode for hard problems. Need step-by-step logic on a tricky algorithm? It goes deep. Need a fast answer? It stays snappy. You can also explicitly control reasoning effort (minimal → high) for predictable behavior and cost.
Process entire codebases, 200-page PDFs, hours of meeting transcripts, or long customer histories in a single prompt. No more chunking, summarizing, or losing the plot halfway through.
Upload images alongside text and get accurate analysis, chart interpretation, UI feedback, or visual reasoning. Perfect for document automation, design review tools, or medical imaging assistants.
74.9% on SWE-bench Verified (with thinking). Generates production-grade code, debugs multi-file projects, writes tests, and chains tools reliably. Developers report 3-5× fewer iterations to ship working features.
Fewer hallucinations. Better personality control. New verbosity and reasoning parameters give you precise output control without prompt engineering gymnastics.
Build agents that remember entire conversation histories, call tools intelligently, and complete multi-step workflows without breaking context.
Analyze thousands of internal docs, policies, and tickets in one go. Generate accurate summaries, compliance reports, or personalized answers instantly.
Internal dev tools that understand your entire monorepo, suggest refactors, write documentation, and even open PRs with near-human accuracy.
Apps that let users upload screenshots, invoices, or diagrams and get instant insights, data extraction, or creative suggestions.
Personal tutors or research assistants that handle long academic papers, solve PhD-level problems, and explain reasoning transparently.
Hyper-personalized responses that reference full customer history, past tickets, and product specs without losing thread.
vs GPT-4o: GPT-5 demonstrates significantly deeper reasoning capabilities, nearly eliminating hallucinations, and excels in multi-step logical tasks, whereas GPT-4o features strong multimodal support but has weaker accuracy and reasoning depth.
vs GPT-4.1: GPT-5 extends context window efficiently to 400,000 tokens while focusing on quality, introduces enhanced multimodal input including voice and video, and improves complex reasoning, whereas GPT-4.1 specializes more in coding-focused tasks and structured code manipulation.
vs OpenAI o3: GPT-5’s Thinking mode yields incorrect answers on fabricated queries only 9% of the time versus 86.7% for OpenAI o3, showcasing substantial improvement in factual reliability.
Measured on the AI/ML API gateway across live traffic. Figures are medians unless stated. Last updated 2026-10-12.
import requests r = requests.post( "https://api.aimlapi.com/v1/chat/completions", headers={"Authorization": "Bearer " + AIMLAPI_KEY}, json={ "model": "openai/gpt-5-2025-08-07", "messages": [ { "role": "user", "content": "Hello!" } ] }, ) print(r.json())
const r = await fetch("https://api.aimlapi.com/v1/chat/completions", { method: "POST", headers: { Authorization: `Bearer ${process.env.AIMLAPI_KEY}`, "Content-Type": "application/json", }, body: JSON.stringify({ "model": "openai/gpt-5-2025-08-07", "messages": [ { "role": "user", "content": "Hello!" } ] }), }); console.log(await r.json());
curl -X POST https://api.aimlapi.com/v1/chat/completions \ -H "Authorization: Bearer $AIMLAPI_KEY" \ -H "Content-Type: application/json" \ -d '{"model":"openai/gpt-5-2025-08-07","messages":[{"role":"user","content":"Hello!"}]}'
OpenAI-compatible — swap the base URL and it works with your existing SDK.
| Type | Price |
|---|---|
| Input | |
| Output | |
| Cached input |
| Benchmark | Score | What it measures | Source | Retrieved |
|---|---|---|---|---|
| AIME 2025 | 94.6% | Competition mathematics (AIME), 2025 | Source | July 8, 2026 |
| SWE-bench Verified | 74.9% | Resolving verified real GitHub issues | Source | July 8, 2026 |
| Intelligence | 23 | Composite score across standardised reasoning, knowledge and problem-solving evaluations, measured independently by Artificial Analysis | Source | September 12, 2026 |
| Coding | 37.8 | Composite score across standardised coding evaluations, measured independently by Artificial Analysis | Source | September 12, 2026 |
| Math | 94.3 | Composite score across standardised mathematics evaluations, measured independently by Artificial Analysis | Source | September 12, 2026 |
| Model | Input | Output | Context | Best for |
|---|---|---|---|---|
GPT-5 This page | Reasoning + agents | |||
| Reasoning + agents | ||||
| Balanced coding + agents | ||||
| Long-context, multimodal & agentic workflows | ||||
| Reasoning + agents |
GPT-5 has a 400,000 tokens context window and can return up to 128,000 tokens.
GPT-5 takes image, text as input and returns text.
Use openai/gpt-5-2025-08-07 as the model id. Requests go to https://api.aimlapi.com/v1/chat/completions.
GPT-5 is priced at input $1.625 / 1M tokens, output $13 / 1M tokens, cached input $0.1625 / 1M tokens.
Yes, GPT-5 can stream responses as they are generated.
Yes, GPT-5 accepts image input alongside text.
GPT-5 was built by OpenAI.
