System-2 Reasoning
Utilizes internal Chain of Thought verification to minimize hallucinations. This ai gpt 5 feature is tailored for graduate-level physics and complex mathematical proof verification.
GPT 5
OpenAI's ai gpt 5 introduces advanced system-2 reasoning and native multimodality. With a 256k context window and agentic autonomy, it excels at complex planning and logic-heavy tasks for enterprise-grade AI applications and research.
API Usage Examples
curl --request POST "https://gptproto.com/v1/chat/completions" \
--header "Authorization: Bearer $GPTPROTO_API_KEY" \
--header "Content-Type: application/json" \
--data '{
"model": "gpt-5",
"messages": [
{
"role": "user",
"content": "Hello"
}
]
}'GPT 5 pricing
Chat, coding agents & document work. Priced per 1M tokens — input, cached input and output are billed separately. GPTProto is 30% below official rates.
Your usage
OpenAI · ≈ 148M tokens/mo (48M cached)
OpenRouter
List + 5.5% credit fee
$259.53
per month
Input (non-cached)$42.20
Cache read$6.33
Output$211
OpenAI
Direct from OpenAI (list price)
$246
per month
Input (non-cached)$40
Cache read$6
Output$200
BEST VALUE
GPTProto
30% off official
$172.20
per month
After discount$172.20
Effective$172.20
Monthly cost by source
OpenRouter
$259.53
OpenAI
$246
GPTProto
$172.20
Save $73.80 / month
on GPTProto vs OpenAI (−30%)
Annual savings ≈ $885.60 · pay as you go
OpenRouter costs include its ~5.5% credit purchase fee. GPTProto applies a per-model discount (10–30% off) and your bonus credits are also spent at discounted rates — savings compound. Estimates assume a 60% cache hit rate.
Related Models
All Models
| Model | Input → Output | ||||
|---|---|---|---|---|---|
| 400K | $0.88 / $7.00 per 1M | $0.09 / $0.09 per 1M | Input: TextInput: ImageInput: Document Output: Text | |
| — | — | $0.30 / $1.20 per 1M | — / $0.006 per 1M | Input: TextInput: Image Output: Text | |
| 1.05M | $0.79 / $2.38 per 1M | — / $0.04 per 1M | Input: Text Output: Text | ||
| 1.05M | $8.00 / $40.00 per 1M | $10.00 / $0.80 per 1M | Input: TextInput: ImageInput: Document Output: Text | ||
| 1.05M | $0.90 / $4.50 per 1M | $0.60 / $0.09 per 1M | Input: TextInput: ImageInput: VideoInput: DocumentInput: Audio Output: Text | ||
| 1M | $9.00 / $45.00 per 1M | $11.25 / $0.23 per 1M | Input: TextInput: ImageInput: Document Output: Text | ||
| 1M | $1.80 / $5.40 per 1M | $2.25 / $0.23 per 1M | Input: TextInput: ImageInput: VideoInput: DocumentInput: Audio Output: Text | ||
| — | 1.31M | $0.15 / $0.50 per 1M | — / $0.03 per 1M | Input: TextInput: ImageInput: VideoInput: Document Output: Text | |
| — | 1.05M | $0.30 / $1.20 per 1M | — / $0.006 per 1M | Input: TextInput: Image Output: Text | |
| 1.31M | $1.26 / $3.96 per 1M | — / $0.23 per 1M | Input: TextInput: ImageInput: Document Output: Text | ||
| 1.05M | $0.90 / $4.50 per 1M | $0.60 / $0.09 per 1M | Input: TextInput: ImageInput: Document Output: Text | ||
| 500K | $1.20 / $3.60 per 1M | — / $0.30 per 1M | Input: TextInput: Image Output: Text | ||
| 1M | $1.80 / $5.40 per 1M | $2.25 / $0.23 per 1M | Input: TextInput: ImageInput: VideoInput: Document Output: Text | ||
| 1M | $4.50 / $22.50 per 1M | $5.63 / $0.45 per 1M | Input: TextInput: ImageInput: Document Output: Text | ||
| 1.05M | $0.90 / $4.50 per 1M | $0.60 / $0.09 per 1M | Input: TextInput: ImageInput: Document Output: Text | ||
| 1.05M | $2.70 / $13.50 per 1M | $0.27 / $0.27 per 1M | Input: TextInput: ImageInput: Document Output: Text | ||
| 1.05M | $0.16 / $0.96 per 1M | $0.20 / $0.02 per 1M | Input: TextInput: ImageInput: Document Output: Text | ||
| 1.05M | $1.60 / $9.60 per 1M | $2.00 / $0.16 per 1M | Input: TextInput: ImageInput: Document Output: Text | ||
| 1.05M | $3.20 / $16.00 per 1M | $4.00 / $0.32 per 1M | Input: TextInput: ImageInput: Document Output: Text | ||
| 500K | $1.20 / $3.60 per 1M | $0.30 / $0.30 per 1M | Input: TextInput: Image Output: Text | ||
| 1M | $1.80 / $9.00 per 1M | $2.25 / $0.18 per 1M | Input: TextInput: Document Output: Text | ||
| 1.05M | $0.48 / $0.96 per 1M | $0.10 / $0.10 per 1M | Input: TextInput: ImageInput: Document Output: Text | ||
| 1.05M | $1.26 / $3.96 per 1M | $0.23 / $0.23 per 1M | Input: TextInput: ImageInput: Document Output: Text | ||
| — | $1.00 / $8.00 per 1M | $0.10 / $0.10 per 1M | Input: TextInput: ImageInput: Document Output: Text | ||
| 1M | $0.36 / $1.44 per 1M | $0.07 / $0.07 per 1M | Input: TextInput: Document Output: Text | ||
| — | 1.05M | $0.30 / $1.20 per 1M | — / $0.006 per 1M | Input: Text Output: Text | |
| 1M | $0.75 / $1.50 per 1M | $0.12 / $0.12 per 1M | Input: TextInput: Image Output: Text | ||
| 1.05M | $24.00 / $144.00 per 1M | — | Input: TextInput: ImageInput: Document Output: Text | ||
| 262K | $0.85 / $3.60 per 1M | $0.14 / $0.14 per 1M | Input: TextInput: Document Output: Text | ||
| 205K | $0.24 / $0.96 per 1M | $0.30 / $0.02 per 1M | Input: TextInput: Document Output: Text | ||
| 262K | $0.54 / $2.70 per 1M | $0.09 / $0.09 per 1M | Input: TextInput: Document Output: Text | ||
| 262K | $0.10 / $0.97 per 1M | — | Input: TextInput: Image Output: Text | ||
| 262K | $0.10 / $0.97 per 1M | — | Input: TextInput: Image Output: Text | ||
| 262K | $0.02 / $0.18 per 1M | — | Input: TextInput: Image Output: Text |
Core ai gpt 5 Features
The standout technical features that make ai gpt 5 the most advanced ai model available on our ai platform today.
Agentic Autonomy
Enhanced state-tracking allows the ai gpt 5 model to manage long-running tasks across multiple tool calls without losing context, perfect for autonomous software engineering.
Native Multimodality
Built from the ground up to process video, audio, and text in a single stream. This ai gpt 5 capability enables real-time temporal analysis for advanced visual and audio support.
Extreme Reliability
Significant improvements in instruction following for nested JSON schemas. The ai gpt 5 engine provides near-human precision for legal compliance and enterprise strategic planning.
ai gpt 5 Frequently Asked Questions
Common questions about the ai gpt 5 model, its capabilities, pricing, and how to integrate it into your workflow using the GPTProto platform.
How does ai gpt 5 differ from GPT-4o?
The ai gpt 5 model introduces agentic ai autonomy and system-2 reasoning, allowing it to manage multi-step ai loops reliably. While GPT-4o is an ai optimized for speed, GPT-5 is an ai focused on accuracy and handling 256k ai context windows. This ai shift reduces ai hallucinations by roughly 40% in logic-heavy ai tasks, making it superior for ai-driven planning and complex ai data analysis.
Is my data used to train the ai gpt 5 model?
No. Data sent through our ai gpt 5 API is never used to train the underlying ai model. We prioritize ai privacy and ai security for all our ai enterprise users. Your ai prompts and ai outputs remain confidential within your ai account, ensuring that your ai proprietary data stays protected while you leverage the advanced ai capabilities of the gpt 5 ai engine.
What is the reasoning latency for ai gpt 5?
Because ai gpt 5 uses an ai internal reasoning process, the ai latency is higher than previous ai models. Standard ai responses average 1.5s for the first ai token, but reasoning-heavy ai requests may take 5 to 10 seconds. This ai delay is a result of the ai verifying its own logic to ensure high ai accuracy, which is essential for ai scientific research and ai legal auditing.
How do I migrate my app to ai gpt 5?
Migrating to ai gpt 5 is simple as the ai API is backward compatible with the ai gpt 4o schema. You only need to update your ai model parameter to gpt-5 in your ai code. Our ai platform handles the rest, including ai load balancing and ai failover. This ensures your ai transition is seamless and your ai application benefits from the new ai reasoning features immediately.
Is fine-tuning available for ai gpt 5?
Currently, ai gpt 5 fine-tuning is in a restricted ai beta. We are working closely with the ai developers at OpenAI to bring ai customization to our ai platform users. If your ai project requires a specialized ai gpt 5 version, please contact our ai support team to discuss your ai requirements and join the ai waitlist for enterprise ai fine-tuning features.
What are the ai gpt 5 rate limits?
The default ai gpt 5 tier supports 5,000 ai requests per minute and 1,000,000 ai tokens per minute. For larger ai enterprise needs, we offer ai quota increases via our ai dashboard. These ai limits ensure that our ai infrastructure remains stable while providing high ai throughput for your most demanding ai gpt 5 applications and ai automated workflows.
Related Articles
Guides, comparisons, and updates related to this model.
All Articles
OpenAI GPT-5.3-Codex vs Claude Opus 4.6: The New Era of AI Agents and Coding Powerhouses
Discover how OpenAI and Anthropic are revolutionizing productivity with GPT-5.3-Codex and Claude Opus 4.6. Explore new benchmarks, AI agent capabilities, and cost-effective API solutions via GPTProto for your tech business. Learn why the shift to autonomous agents matters for every industry today.
GPT-5.3-Codex: Redefining Software Engineering AI
Explore the massive leap in AI coding with OpenAI's GPT-5.3-Codex. Learn how this recursive model dominates Terminal-Bench and SWE-Bench Pro, its visual OSWorld capabilities, and how tools like GPTProto help developers integrate these powerful APIs at lower costs for maximum efficiency.
GPT-5.3-Codex vs Claude 4.6: The Agentic AI Era
Explore the massive updates from OpenAI and Anthropic. Learn how GPT-5.3-Codex and Claude Opus 4.6 are redefining productivity through autonomous coding and agent teams. Discover how to manage these powerful models efficiently using unified API solutions for maximum cost savings.
GPT-5.3-Codex: The New Frontier of AI Coding
GPT-5.3-Codex delivers massive performance gains and recursive self-improvement for developers. Discover how this model changes the AI landscape today.