This page tracks training cutoff dates for every major frontier LLM as of June 2026. Training cutoff determines which web events and brand mentions enter the parametric recall of the model.
Training Cutoff Snapshot (June 2026)
| Model | Vendor | Reported Cutoff |
|---|---|---|
| GPT-5.6 | OpenAI | February 16, 2026 |
| GPT-5.6 Pro | OpenAI | February 16, 2026 |
| GPT-6 Astra | OpenAI | April 30, 2026 |
| Claude Opus 5 | Anthropic | May 2026 |
| Grok 4.7 | xAI | May 2026 |
| Claude Mythos 5 | Anthropic | ~April 2026 |
| Claude Opus 4.7 | Anthropic | ~January 2026 |
| Claude Sonnet 4.6 | Anthropic | ~November 2025 |
| Claude Haiku 4.5 | Anthropic | ~September 2025 |
| Gemini 3.1 Pro | ~February 2026 | |
| DeepSeek V4 | DeepSeek | ~April 2026 |
| DeepSeek V4 | DeepSeek | ~February 2026 |
| Qwen 3.7 | Alibaba | ~April 2026 |
| Qwen 3.6 | Alibaba | ~February 2026 |
| Llama 4.5 | Meta | ~March 2026 |
| Llama 4 (original) | Meta | ~December 2025 |
| Mistral Medium 3 | Mistral AI | ~April 2026 |
| Hunyuan Large 3 | Tencent | ~April 2026 |
| ERNIE 5.1 | Baidu | ~April 2026 |
| GLM-6 | Zhipu AI | ~April 2026 |
| Grok 4 | xAI | ~Continuous via X integration |
Key Takeaways
- GPT-5.6 has a February 16, 2026 cutoff according to OpenAI. Later models moved the frontier forward: GPT-6 Astra to April 30, 2026, and Claude Opus 5 and Grok 4.7 to May 2026.
- The mid-2026 cohort of releases (Claude Mythos 5, Qwen 3.7) clusters around an April 2026 cutoff.
- Grok 4 uniquely incorporates continuous X-platform data through its native integration, with no fixed cutoff for X-derived content.
- Brand mentions earned between two model versions' cutoffs enter the newer model's parametric recall and may exit older models that get deprecated.
Why Cutoff Dates Matter for Brand Visibility
Training cutoff determines what enters and exits a model's default-mode (parametric) recall. Brands that earned major coverage between the previous and current cutoff get added to recall. Retrieval-mode citation (ChatGPT Search, Perplexity, Google AI Overviews) is independent of cutoff and depends on which sources retrieval providers index.
Methodology
Cutoff dates from vendor disclosures, model cards, and reported benchmarking. Vendors disclose cutoff with varying precision; numbers expressed as approximate. Updated monthly.
How Presenc AI Helps
Presenc AI tracks brand visibility on each frontier model continuously so brand teams see when cutoff refreshes shift their default-mode recall.