Model comparison
Claude Sonnet 5.5 vs Grok 4.7
Claude
GrokCompare published specifications, vendor API list prices and measured Borg performance. Both models are included in Borg.
Claude Sonnet 5.5
Grok 4.7
Included in Borg
At a glance
| Specification | Claude Sonnet 5.5 | Grok 4.7 |
|---|---|---|
| Provider | Anthropic | xAI |
| Release | 2026-09-28 Vendor source | 2026-09-21 Vendor source |
| Context | 1,000,000 tokens Vendor source | 500,000 tokens Vendor source |
| Modalities | Input: text, image; output: text | Input: text, image; output: text |
| Reasoning / thinking modes | Yes / Not published | Yes / Not published |
| Open weights | No | No |
| Vendor API list price / 1M tokens | $2 input / $10 output | $2 input / $6 output Global rates for prompts below 200,000 input tokens. At 200,000 input tokens or more, all tokens use long-context rates: $4 input / $12 output / $1 cached input per 1M tokens. US regional inference costs 1.1× the global rate. |
| Borg | Included in Borg subscription | Included in Borg subscription |
Anthropic
xAIMeasured 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)
Output tokens per second (whole turn)
| Metric | Claude Sonnet 5.5 | Grok 4.7 |
|---|---|---|
| Time to first token (gateway proxy) p50 | 2640 ms (35971 samples) | 1037 ms (1436 samples) |
| Tokens per second (end to end) p50 | 76.7 output tokens per second (86888 samples) | 33 output tokens per second (1467 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.
Claude Sonnet 5.5: Measured on Borg: SearchAtlas AI Gateway production request logs. 30-day window ending 2026-10-08; 94296 requests. Minimum 100 samples per published request metric.
Grok 4.7: Measured on Borg: SearchAtlas AI Gateway production request logs. 30-day window ending 2026-10-08; 1681 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
Vendor benchmarks
Vendor-reported scores may use different settings; do not treat them as a controlled head-to-head test.
How to choose
Claude Sonnet 5.5 is listed for well-scoped bug fixes and code reviews, whereas Grok 4.7 is listed for long-running agentic coding. Choosing between Claude Sonnet 5.5 and Grok 4.7 requires checking published specifications against observed Borg traffic for your workflow.
Key differences
| Spec | Claude Sonnet 5.5 | Grok 4.7 |
|---|---|---|
| Context window | 1,000,000 tokens Vendor source Larger context | 500,000 tokens Vendor source |
| Reasoning modes | Yes / Not published | Yes / Not published |
| Release date | 2026-09-28 Vendor source | 2026-09-21 Vendor source |
| API price input / 1M | 2 | 2 Global rates for prompts below 200,000 input tokens. At 200,000 input tokens or more, all tokens use long-context rates: $4 input / $12 output / $1 cached input per 1M tokens. US regional inference costs 1.1× the global rate. |
| API price output / 1M | 10 | 6 Global rates for prompts below 200,000 input tokens. At 200,000 input tokens or more, all tokens use long-context rates: $4 input / $12 output / $1 cached input per 1M tokens. US regional inference costs 1.1× the global rate. Lower listed rate |
| Time to first token (gateway proxy) | 2640 ms (35971 samples) | 1037 ms (1436 samples) Lower median |
| Output tokens per second (whole turn) | 76.7 output tokens/s (whole turn) (86888 samples) Higher measured rate | 33 output tokens/s (whole turn) (1467 samples) |
| Request success | Not published | Not published |
| Coding bench | Not published | Not published |
FAQ
How do Claude Sonnet 5.5 and Grok 4.7 compare for coding?
Claude Sonnet 5.5 has a Borg coding benchmark of not published; Grok 4.7 has not published. The Claude Sonnet 5.5–Grok 4.7 coding comparison cannot establish an overall winner from this small test alone.
How quickly do Claude Sonnet 5.5 and Grok 4.7 start responding on Borg?
Borg median first response for Claude Sonnet 5.5 is 2,640 ms; for Grok 4.7 it is 1,037 ms. The Claude Sonnet 5.5–Grok 4.7 gateway medians are observations, not guaranteed latency for individual requests.
What are the API prices for Claude Sonnet 5.5 and Grok 4.7?
The listed API rate for Claude Sonnet 5.5 is $2 input / $10 output per 1M tokens; for Grok 4.7 it is $2 input / $6 output per 1M tokens. Neither Claude Sonnet 5.5 nor Grok 4.7 has its Borg subscription charge represented by those provider API rates. Claude Sonnet 5.5 vendor source · Grok 4.7 vendor source