GPT Chat Latest Paid vs 
Muse Spark 1.2 Contributor Paid
GPT Chat Latest vs Muse Spark 1.2 Contributor compared — price per token, context window, multimodality, openness and which to choose. Full 2026 breakdown.
GPT Chat Latest — full profile › · Muse Spark 1.2 Contributor — 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)
$0.2 /M outputManaged API (no infra to run)
GPT Chat Latest vs Muse Spark 1.2 Contributor specs
| Spec | GPT Chat Latest | Muse Spark 1.2 Contributor | Winner |
|---|---|---|---|
| Maker | OpenAI | Meta | – |
| Type | Proprietary | Proprietary | – |
| Context window | 400K tokens | 1M tokens | |
| Input price | $5/M | $0.1/M | |
| Output price | $30/M | $0.2/M | |
| Vision / multimodal | Yes | Yes | = Tie |
| Tool / function calling | Yes | Yes | = Tie |
| Self-hostable | No (API only) | No (API only) | – |
| License | Proprietary | Proprietary | – |
Price gap & when to choose each
Muse Spark 1.2 Contributor is ~150× cheaper than GPT Chat Latest on output tokens ($0.2 vs $30 per M tokens).
- You want frontier performance through a managed API
- You value reliability & ecosystem
- You don't want to manage infrastructure
- You want frontier performance through a managed API
- You need the longer 1M context window
- You want the lower output price
- You value reliability & ecosystem
- You don't want to manage infrastructure
Feature comparison
| Capability | GPT Chat Latest | Muse Spark 1.2 Contributor |
|---|---|---|
| Open weights (downloadable) | ✗ | ✗ |
| Self-hostable | ✗ | ✗ |
| Runs fully offline | ✗ | ✗ |
| Vision / multimodal | ✓ | ✓ |
| Tool / function calling | ✓ | ✓ |
| 1M+ context window | ✗ | ✓ |
How GPT Chat Latest and Muse Spark 1.2 Contributor score
| Criterion | GPT Chat Latest | Muse Spark 1.2 Contributor |
|---|---|---|
| Cost-efficiency | 3.0 | 5.0 |
| Context window | 4.5 | 5.0 |
| Openness | 1.5 | 1.5 |
| Self-hosting | 1.0 | 1.0 |
| Multimodality | 5.0 | 5.0 |
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...
Muse Spark 1.2 Contributor Paid
Muse Spark 1.2 contributor tier is a reasoning model from Meta designed for developers who want to start building at an even lower cost. It’s meaningfully cheaper than Muse Spark...
Frequently asked questions
GPT Chat Latest vs Muse Spark 1.2 Contributor — which is cheaper?
Muse Spark 1.2 Contributor is cheaper on output ($0.2/M vs $30/M).
Which has the larger context window?
Muse Spark 1.2 Contributor offers the larger context window (1M tokens).
GPT Chat Latest vs Muse Spark 1.2 Contributor — which should I pick in 2026?
Choose Muse Spark 1.2 Contributor for the lower output price ($0.2/M vs $30/M). It also gives you the larger 1M context window.
People also compare
Explore more open-source AI
Browse the full open-source model leaderboard, thousands of tools and live benchmarks — all in one place.
Open the leaderboard →