Model comparison
Borg Fusion vs Claude Opus 5.5
ClaudeCompare published specifications, vendor API list prices and measured Borg performance. Both models are included in Borg.
Borg Fusion
Claude Opus 5.5
Included in Borg
At a glance
| Specification | Borg Fusion | Claude Opus 5.5 |
|---|---|---|
| Provider | Borg | Anthropic |
| Release | — | 2026-09-22 Vendor source |
| Context | — | 1,000,000 tokens Vendor source |
| Modalities | — | Input: text, image; output: text |
| Reasoning / thinking modes | Not published / low, medium, high | Yes / Not published |
| Open weights | — | No |
| Vendor API list price / 1M tokens | — | $4 input / $20 output |
| Borg | Included in Borg subscription | Included in Borg subscription |
AnthropicNot published by the vendor: release, context, modalities, open weights, vendor api list price / 1m tokens.
Measured on Borg
Metrics are not directly comparable to vendor benchmark claims. Models served different requests; this is observed gateway traffic, not a controlled head-to-head test.
Time to first token (gateway proxy)
No published measurement for this model.
Output tokens per second (whole turn)
No published measurement for this model.
| Metric | Borg Fusion | Claude Opus 5.5 |
|---|---|---|
| Time to first token (gateway proxy) p50 | Not published | 2946 ms (75410 samples) |
| Tokens per second (end to end) p50 | Not published | 60 output tokens per second (203387 samples) |
| Request success rate | Not published | Not published |
| Coding bench pass rate | Not published | Not published |
Measurement window, samples and methodology
The fleet reference is the median of published model medians, not a request-weighted result. Prompt lengths, reasoning settings and traffic differ between models.
Borg Fusion: Measured on Borg: SearchAtlas AI Gateway production request logs. 30-day window ending 2026-10-08; 0 requests. Minimum 100 samples per published request metric.
Claude Opus 5.5: Measured on Borg: SearchAtlas AI Gateway production request logs. 30-day window ending 2026-10-08; 220887 requests. Minimum 100 samples per published request metric.
Completion speed covers the whole turn including queueing and reasoning time; it is not a streaming tokens-per-second figure.
- Time to first token (gateway proxy): time until the first streamed response event reaches the gateway; our closest available measure of time to first token
- Tokens per second (end to end): tokens per second, end to end: provider-reported output tokens divided by the whole turn's elapsed time, including queueing and reasoning; not a streaming per-token rate
How to choose
Borg Fusion is listed for multi-step tasks, whereas Claude Opus 5.5 is listed for long-running agentic coding across repositories. Choosing between Borg Fusion and Claude Opus 5.5 requires checking published specifications against observed Borg traffic for your workflow.
Key differences
| Spec | Borg Fusion | Claude Opus 5.5 |
|---|---|---|
| Context window | Not published | 1,000,000 tokens Vendor source |
| Reasoning modes | Not published / low, medium, high | Yes / Not published |
| Release date | Not published | 2026-09-22 Vendor source |
| API price input / 1M | Not published | 4 |
| API price output / 1M | Not published | 20 |
| Time to first token (gateway proxy) | Not published | 2946 ms (75410 samples) |
| Output tokens per second (whole turn) | Not published | 60 output tokens/s (whole turn) (203387 samples) |
| Request success | Not published | Not published |
| Coding bench | Not published | Not published |
FAQ
How do Borg Fusion and Claude Opus 5.5 compare for coding?
Borg Fusion has a Borg coding benchmark of not published; Claude Opus 5.5 has not published. The Borg Fusion–Claude Opus 5.5 coding comparison cannot establish an overall winner from this small test alone.
How quickly do Borg Fusion and Claude Opus 5.5 start responding on Borg?
Borg median first response for Borg Fusion is not published; for Claude Opus 5.5 it is 2,946 ms. The Borg Fusion–Claude Opus 5.5 gateway medians are observations, not guaranteed latency for individual requests.
What are the API prices for Borg Fusion and Claude Opus 5.5?
The listed API rate for Borg Fusion is not published; for Claude Opus 5.5 it is $4 input / $20 output per 1M tokens. Neither Borg Fusion nor Claude Opus 5.5 has its Borg subscription charge represented by those provider API rates. Claude Opus 5.5 vendor source