Since GPT-4’s release in 2023, each month brings rumors about the successor. What we know as of mid-March 2026 boils down to three lines: OpenAI is preparing a natively multimodal model with more stable structured reasoning and a much larger context window. Everything else deserves to be handled with caution.
What OpenAI Actually Said
Sam Altman confirmed several times that a model ‘significantly superior’ to GPT-4 is in training. OpenAI’s leadership describes a qualitative leap comparable to GPT-3 → GPT-4: not just an iteration, but a step change.
Public communications remain cautious. No benchmarks, no release date, no official name – ‘GPT-5’ is used by convention. OpenAI has, however, raised its safety testing framework, suggesting a model powerful enough to trigger its full internal protocol.
“When you use it for the first time, you’ll have the same kind of moment as going from GPT-3 to GPT-4.”
What Leaks Suggest
Three technical clues keep coming up in infrastructure conversations:
- 01
Large-Scale Mixture of Experts
Like Claude 3.5 and Gemini 1.5, GPT-5 would be an MoE – multiple specialized sub-models activated on-demand, allowing parameter increases without exploding inference costs.
- 02
Native Multimodality
Text and image input and output, plus audio and video in a single model, without external pipeline. Reasoning crosses modalities without degradation, changing everything for agents.
- 03
Integrated Reasoning
The ‘reflection’ mode of GPT-o1/o3 would become default, with adjustable cost. The model decides how much chain-of-thought to allocate per question.
What GPT-5 Should Be Able to Do
If the trajectory of Claude 3.7 and Gemini 2 is any guide, we can safely anticipate:
🧠Structured Reasoning
Math, multi-step planning, complex code – without hallucinating.
🪟Long, Stable Context
Work on 500-page docs without quality loss in the middle.
🎨Native Multimodal
Image generation and video understanding in the same session.
🛠️Reliable Tool Use
More relevant tool choice, API planning, smart retry.
⚡Adjustable Latency
Fast mode for chat, slow and deep mode for reasoning.
🔒Finer Refusals
Fewer false positives, better business context understanding.
How Much Will GPT-5 Cost?
OpenAI has lowered its price per token with each major generation. The most likely trajectory:
| Model | Input / 1M | Output / 1M |
|---|---|---|
| GPT-4 (2023) | $30 | $60 |
| GPT-4o (2024) | $5 | $15 |
| GPT-4.1 (2025) | $2 | $8 |
| GPT-5 (rumored) | ~ $5-10 | ~ $20-40 |
Batch mode and enterprise pricing should continue to offer 30 to 50% discounts.
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Facing Claude 4 and Gemini 3
GPT-5 isn’t arriving in an empty market. Anthropic and Google have raised the bar.
Anthropic
Claude 4
Reference for long reasoning and French writing quality. Very solid on code.
Gemini 3
Advantage on ultra-long context (10M+ tokens) and Workspace integration.
OpenAI
GPT-5
Must hold ground on versatility and regain ground on reasoning.
When to Expect It?
No confirmed date. OpenAI’s pattern suggests a phased rollout:
- 1
Phase 1 – Red Team & Partners
A few weeks of closed testing (Microsoft, governments, key enterprise partners).
- 2
Phase 2 – ChatGPT Plus & Team
Gradual rollout to paying subscribers, by regional waves.
- 3
Phase 3 – Public API
Opening to developers, with quotas and rate limits initially.
- 4
Phase 4 – Mass Pricing
Price stabilization and arrival in free / Edu / NGO plans.
Frequently Asked Questions
Has GPT-5 Been Officially Announced? +
OpenAI confirmed working on a next-generation model without publishing its datasheet. Communications from Sam Altman and Mira Murati describe a leap comparable to GPT-3 → GPT-4, with no firm timeline to date.
What Do We Know About the Context Window? +
Recent GPT-4.x deployments already reach 128k to 1M tokens depending on variants. Leaks mention for GPT-5 a standard window of 1M tokens and an extended mode for enterprises. To be confirmed at release.
Will GPT-5 Be Natively Multimodal? +
The strong hypothesis is yes: text and image input and output, plus audio and video in a single model, with more stable reasoning across modalities – in line with GPT-4o.
Will Prices Go Down or Up? +
OpenAI has a clear trend to lower price per token with each generation (GPT-4 → GPT-4o → GPT-4.1 all dropped). Expect GPT-5 higher in absolute terms but lower per unit quality, especially via batch mode.
When Will GPT-5 Come Out? +
No confirmed date. Rumors mention a 2026 window with phased access (enterprises first, then ChatGPT, API last).
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