GPT-5.5 Paid vs 
Claude Opus 4.8 Paid
GPT-5.5 vs Claude Opus 4.8 compared — price per token, context window, multimodality, openness and which to choose. Full 2026 breakdown.
GPT-5.5 — full profile › · Claude Opus 4.8 — full profile ›
Prices & specs refreshed from live data · OpenSourceAI.tech
Open-model prices = cheapest provider via OpenRouter; official maker rates may be higher.
GPT-5.5 vs Claude Opus 4.8 specs
| Spec | GPT-5.5 | Claude Opus 4.8 |
|---|---|---|
| Maker | OpenAI | Anthropic |
| Type | Proprietary | Proprietary |
| Context window | 1.1M tokens | 1M tokens |
| Input price | $5/M | $5/M |
| Output price | $30/M | $25/M |
| Vision / multimodal | Yes | Yes |
| Tool / function calling | Yes | Yes |
| Self-hostable | No (API only) | No (API only) |
| License | Proprietary | Proprietary |
Feature comparison
| Capability | GPT-5.5 | Claude Opus 4.8 |
|---|---|---|
| Open weights (downloadable) | ✗ | ✗ |
| Self-hostable | ✗ | ✗ |
| Runs fully offline | ✗ | ✗ |
| Vision / multimodal | ✓ | ✓ |
| Tool / function calling | ✓ | ✓ |
| 1M+ context window | ✓ | ✓ |
Benchmarks: GPT-5.5 vs Claude Opus 4.8
Independent benchmark scores measured by Artificial Analysis. Higher is better (except latency).
Benchmark data by Artificial Analysis.
How GPT-5.5 and Claude Opus 4.8 score
| Criterion | GPT-5.5 | Claude Opus 4.8 |
|---|---|---|
| Cost-efficiency | 3.0 | 3.0 |
| Context window | 5.0 | 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-5.5 Paid
GPT-5.5 is OpenAI’s frontier model designed for complex professional workloads, building on GPT-5.4 with stronger reasoning, higher reliability, and improved token efficiency on hard tasks. It features a 1M+ token...
Claude Opus 4.8 Paid
Claude Opus 4.8 is Anthropic's most capable generally available model in the Opus family. It supports text, image, and file inputs with text output, with reasoning support and a 1M-token...
Other models in these families
These variants are tracked but not compared here — one page per family keeps the comparison readable.
Frequently asked questions
GPT-5.5 vs Claude Opus 4.8 — which is cheaper?
Claude Opus 4.8 is cheaper on output ($25/M vs $30/M).
Which has the larger context window?
GPT-5.5 offers the larger context window (1.1M tokens).
GPT-5.5 vs Claude Opus 4.8 — which should I pick in 2026?
Choose Claude Opus 4.8 for the lower output price ($25/M vs $30/M). Choose GPT-5.5 if you need the larger 1.1M context window.
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