GPT Chat Latest Paid vs INMercury 2.5 Paid
GPT Chat Latest vs Mercury 2.5 compared — price per token, context window, multimodality, openness and which to choose. Full 2026 breakdown.
GPT Chat Latest — full profile › · Mercury 2.5 — full profile ›
Prices & specs refreshed from live data · olud.ai
Open-model prices = cheapest provider via OpenRouter; official maker rates may be higher.
$30 /M outputManaged API (no infra to run)
$0.15 /M outputManaged API (no infra to run)
GPT Chat Latest vs Mercury 2.5 specs
| Spec | GPT Chat Latest | Mercury 2.5 | Winner |
|---|---|---|---|
| Maker | OpenAI | Inception | – |
| Type | Proprietary | Proprietary | – |
| Context window | 400K tokens | 260K tokens | |
| Input price | $5/M | $0.04/M | INMercury 2.5 |
| Output price | $30/M | $0.15/M | INMercury 2.5 |
| Vision / multimodal | Yes | No | |
| Tool / function calling | Yes | Yes | = Tie |
| Self-hostable | No (API only) | No (API only) | – |
| License | Proprietary | Proprietary | – |
Price gap & when to choose each
Mercury 2.5 is ~200× cheaper than GPT Chat Latest on output tokens ($0.15 vs $30 per M tokens).
- You want frontier performance through a managed API
- You need the longer 400K context window
- You value reliability & ecosystem
- You don't want to manage infrastructure
- You want frontier performance through a managed API
- You want the lower output price
- You value reliability & ecosystem
- You don't want to manage infrastructure
Feature comparison
| Capability | GPT Chat Latest | Mercury 2.5 |
|---|---|---|
| Open weights (downloadable) | ✗ | ✗ |
| Self-hostable | ✗ | ✗ |
| Runs fully offline | ✗ | ✗ |
| Vision / multimodal | ✓ | ✗ |
| Tool / function calling | ✓ | ✓ |
| 1M+ context window | ✗ | ✗ |
How GPT Chat Latest and Mercury 2.5 score
| Criterion | GPT Chat Latest | Mercury 2.5 |
|---|---|---|
| Cost-efficiency | 3.0 | 5.0 |
| Context window | 4.5 | 4.0 |
| Openness | 1.5 | 1.5 |
| Self-hosting | 1.0 | 1.0 |
| Multimodality | 5.0 | 3.5 |
Scores come from live data — output price (cost), context length, open vs closed weights (openness & self-hosting) and vision/tool support (multimodality). Raw task quality isn't scored here; it depends on your benchmark — see the verdict.
What each model is
GPT Chat Latest Paid
GPT Chat Latest points to OpenAI's stable API alias `chat-latest` that always resolves to the latest Instant chat model used in ChatGPT. As OpenAI rolls out new Instant model updates...
Mercury 2.5 Paid
Mercury 2.5 is the fastest reasoning LLM, and the latest diffusion LLM (dLLM) from Inception. Instead of generating tokens sequentially, Mercury 2.5 produces and refines multiple tokens in parallel, achieving...
Frequently asked questions
GPT Chat Latest vs Mercury 2.5 — which is cheaper?
Mercury 2.5 is cheaper on output ($0.15/M vs $30/M).
Which has the larger context window?
GPT Chat Latest offers the larger context window (400K tokens).
GPT Chat Latest vs Mercury 2.5 — which should I pick in 2026?
Choose Mercury 2.5 for the lower output price ($0.15/M vs $30/M). Choose GPT Chat Latest if you need the larger 400K context window.
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