GPT-5 by OpenAI: Full Overview of Features, Pricing & Availability
Skyalo Team • Updated: December 17, 2025 at 12:46 PM • 3 min read
TL;DR:GPT-5
is OpenAI’s new flagship system that combines a fast main mode and a deep reasoning mode, orchestrated by a smart router. Major upgrades include improved accuracy, better coding, stronger multimodal understanding, and new safety protocols. Available in ChatGPT and via API.
What Is GPT-5?
GPT-5 is a unified system with a fast default mode and a deeper reasoning mode (GPT-5 thinking) connected by an online router that decides how much “thinking” a task needs. If you hit usage limits, it can switch to mini variants seamlessly.
Key Improvements
Fewer hallucinations, less agreement bias. More faithful instruction following and transparency about limits.
Coding & frontend. Stronger UI generation, large-repo debugging, and durable multi-tool chains.
Multimodal. Better at images, charts, screenshots, spatial tasks, and vision-based reasoning.
Health reasoning. Higher accuracy on HealthBench (not a medical substitute).
Safety.Safe-completions focuses on helpful, safe outputs over hard refusals.
Benchmarks & Performance
Math: AIME 2025 (no tools) — 94.6%
Coding: SWE-bench Verified — 74.9%; Aider Polyglot — 88%
Multimodal: MMMU — 84.2%
Health: HealthBench (Hard) — 46.2%
These gains are documented in the GPT-5 System Card and translate into more accurate, useful answers in day-to-day work.
Access & Availability
ChatGPT: GPT-5 is the new default. Plus has higher limits; Pro includes GPT-5 Pro (deep reasoning).
Teams / Enterprise / Edu: Team available now; Enterprise & Edu roll out within a week.
API models:
gpt-5,gpt-5-mini,gpt-5-nano, plusgpt-5-chat-latest(chat-optimized).
API Pricing & Context Window
Model | Input (per 1M tokens) | Output (per 1M tokens) |
|---|---|---|
| $1.25 | $10.00 |
| $0.25 | $2.00 |
| $0.05 | $0.40 |
Context window: up to 400K tokens (~272K input + 128K output).
Latest pricing: OpenAI Pricing
Why GPT-5 Matters for Skyalo (Global eSIM)
Multilingual support 24/7. Real-time eSIM help in 18+ languages.
SEO content & localization. Country-level FAQs, landing pages, and blog posts for 200+ countries.
Smart support flows. ICCID checks, activation status, APN instructions, and edge-case troubleshooting.
Recommendation engine. Suggest best eSIM plan by country, trip length, and data needs.
Safer replies. Fewer hallucinations and safer guidance for telecom-critical scenarios.
Explore Skyalo: global eSIM for travelers
FAQ
What is GPT-5?
A flagship AI model by OpenAI that blends fast responses with deep reasoning via a smart router. It improves accuracy, coding, and multimodal understanding.
How much does GPT-5 cost in the API?
From 1.25/1M (gpt-5); output up to $10/1M tokens.
Is GPT-5 free in ChatGPT?
Rolling out gradually. Free users have access with lower limits; Pro includes GPT-5 Pro.
How is GPT-5 different from GPT-4o or o3?It succeeds both lines: gpt-5-main follows GPT-4o, gpt-5-thinking follows o3, adding routing and safe-completions.
Sources
OpenAI Blog — GPT-5 launch
GPT-5 System Card (architecture & safety)
Safe-completions research
OpenAI API Pricing
Skyalo — global eSIM app
