o1 Paid vs 
Claude Opus 5.5 Paid
o1 vs Claude Opus 5.5 compared — price per token, context window, multimodality, openness and which to choose. Full 2026 breakdown.
o1 — full profile › · Claude Opus 5.5 — full profile ›
Prices & specs refreshed from live data · olud.ai
Open-model prices = cheapest provider via OpenRouter; official maker rates may be higher.
$60 /M outputManaged API (no infra to run)
$20 /M outputManaged API (no infra to run)
o1 vs Claude Opus 5.5 specs
| Spec | o1 | Claude Opus 5.5 | Winner |
|---|---|---|---|
| Maker | OpenAI | Anthropic | – |
| Type | Proprietary | Proprietary | – |
| Context window | 200K tokens | 1M tokens | |
| Input price | $15/M | $4/M | |
| Output price | $60/M | $20/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
Claude Opus 5.5 is ~3.0× cheaper than o1 on output tokens ($20 vs $60 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 | o1 | Claude Opus 5.5 |
|---|---|---|
| Open weights (downloadable) | ✗ | ✗ |
| Self-hostable | ✗ | ✗ |
| Runs fully offline | ✗ | ✗ |
| Vision / multimodal | ✓ | ✓ |
| Tool / function calling | ✓ | ✓ |
| 1M+ context window | ✗ | ✓ |
Benchmarks: o1 vs Claude Opus 5.5
Independent benchmark scores measured by Artificial Analysis. Higher is better (except latency).
Benchmark data by Artificial Analysis.
How o1 and Claude Opus 5.5 score
| Criterion | o1 | Claude Opus 5.5 |
|---|---|---|
| Cost-efficiency | 2.0 | 3.0 |
| Context window | 4.0 | 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
o1 Paid
The latest and strongest model family from OpenAI, o1 is designed to spend more time thinking before responding. The o1 model series is trained with large-scale reinforcement learning to reason...
Claude Opus 5.5 Paid
Claude Opus 5.5 is Anthropic's flagship model for demanding reasoning, coding, and long-horizon agentic work, succeeding Claude Opus 5. It is particularly strong at multi-step changes in large codebases, code...
Other models in these families
These variants are tracked but not compared here — one page per family keeps the comparison readable.
Frequently asked questions
o1 vs Claude Opus 5.5 — which is cheaper?
Claude Opus 5.5 is cheaper on output ($20/M vs $60/M).
Which has the larger context window?
Claude Opus 5.5 offers the larger context window (1M tokens).
o1 vs Claude Opus 5.5 — which should I pick in 2026?
Choose Claude Opus 5.5 for the lower output price ($20/M vs $60/M). It also gives you the larger 1M context window.
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