$ diff gpt-image-2-5-flare k2-horizon
GPT-Image-2.5 Flare vs K2 Horizon
Values come from GPT-Image-2.5 Flare and K2 Horizon, where each is cited to its source. This page states no benchmark result and ranks neither model — it puts two published specifications next to each other. Where a lab has not published a figure, the row says so rather than guessing.
OpenAIGPT-Image-2.5 Flare
- context
- —
- weights
- closed
- $/M in
- $30
- $/M out
- $2
- context
- 524K
- weights
- open
- $/M in
- —
- $/M out
- —
What actually differs
- Weights
- K2 Horizon publishes weights (Apache 2.0 (weights and code)); GPT-Image-2.5 Flare is API-only. That decides self-hosting, air-gapped deployment and fine-tuning before any capability question does.
- Recency
- GPT-Image-2.5 Flare shipped 5 days after K2 Horizon (2026-09-08 vs 2026-09-03).
Full spec
| Attribute | GPT-Image-2.5 Flare | K2 Horizon |
|---|---|---|
| Developer | OpenAI | Ifm |
| Released | 2026-09-08 | 2026-09-03 |
| Context window | not recorded | 524,288 (flagship 375B-A23B, native from midtraining onward) |
| Pricing | image input $8.00/M tokens ($2.00/M cached) · image output $30.00/M tokens · text input $5.00/M tokens ($1.25/M cached) | not recorded |
| License | proprietary | Apache 2.0 (weights and code) |
| Availability | OpenAI API | Hugging Face (weights, code, checkpoints, training data where redistributable) |