Claude Sonnet 4.6 vs GPT-5.1
Benchmark Performance
Available Benchmarks
| Benchmark | Claude Sonnet 4.6 | GPT-5.1 |
|---|---|---|
| ARC-AGI-1verified-v1-15fb467fd4fc · verified_score · leader | 86.50100% of row best · percent · Claude Sonnet 4.6 (High) | 72.8384% of row best · percent · GPT-5.1 (Thinking, High) |
| ARC-AGI-2verified-v2-9a3db289984e · verified_score · leader | 60.42100% of row best · percent · Claude Sonnet 4.6 (High) | 17.6429% of row best · percent · GPT-5.1 (Thinking, High) |
| LMArena Document Arenadocument-2026-07-30-011508720696 · arena_rating · leader | 1,482.80100% of row best · rating · claude-sonnet-4-6; 95% CI [1476.49799837, 1489.09368537]; votes 54427; rank 8 | 1,400.8494% of row best · rating · gpt-5.1; 95% CI [1391.40144375, 1410.27736947]; votes 8220; rank 37 |
| LMArena Search Arenasearch-2026-08-24-011508720696 · arena_rating · leader | 1,221.23100% of row best · rating · claude-sonnet-4-6-search; 95% CI [1216.39472071, 1226.06821163]; votes 134905; rank 7 | 1,199.4498% of row best · rating · gpt-5.1-search; 95% CI [1194.20592738, 1204.68165473]; votes 59909; rank 14 |
| LMArena Text Arenatext-2026-09-01-011508720696 · arena_rating · leader | 1,458.01100% of row best · rating · claude-sonnet-4-6; 95% CI [1454.41608210, 1461.60383515]; votes 66343; rank 32 | 1,422.4798% of row best · rating · gpt-5.1; 95% CI [1418.85253526, 1426.08681113]; votes 43002; rank 96 |
| LMArena Vision Arenavision-2026-08-27-011508720696 · arena_rating · leader | 1,282.25100% of row best · rating · claude-sonnet-4-6; 95% CI [1275.84615489, 1288.65223369]; votes 25610; rank 25 | 1,235.1996% of row best · rating · gpt-5.1; 95% CI [1227.44529223, 1242.93837299]; votes 10223; rank 60 |
| ToneBench2026-08-28-10-task-cd9819ab6e4d · overall_score · leader | 83.63100% of row best · points · Claude Sonnet 4.6 · 2,525 output tokens / case | 75.9891% of row best · points · GPT-5.1 · 3,970 output tokens / case |
| Overall ResultCounted from the protocol-matched rows above | 7 benchmark winsOverall lead | 0 benchmark wins |
Third-party benchmark Only like-for-like primary-publisher results are shown; raw scores, relative scores, configuration, and token spend remain visible.
Technical Differences
Side-by-Side Facts
| Field | Claude Sonnet 4.6 | GPT-5.1 |
|---|---|---|
| Developer | Anthropic | Openai |
| Family | Claude 4 | Gpt 5 1 |
| Model | Claude Sonnet 4.6 | GPT-5.1 |
| Version | Claude Sonnet 4.6 | GPT-5.1 |
| Lifecycle | active | active |
| Released | 2026-02-17 | 2025-11-13 |
| Knowledge cutoff | 2025-08-01 | 2024-09-30 |
| Input modalities | Unknown | Unknown |
| Output modalities | Unknown | Unknown |
| Context window | 1,000,000 | 400,000 |
| Total parameters | Unknown | Unknown |
| Active parameters | Unknown | Unknown |
| License | Unknown | Unknown |
| Open weights | No | No |
| API available | Yes | Yes |
| Self-hostable | No | No |
| Provider access | Anthropic (Standard), Deepinfra (Standard) | Openai (Standard), Openrouter (Standard) |
| Capabilities | chat, generation, reasoning, structured_outputs, tools | chat, generation, reasoning, structured_outputs, tools |
13 comparable fields · 8 material differences · Interactive comparison only; indexing gate not met
Claude Sonnet 4.6 Capabilities
GPT-5.1 Capabilities
Internal Comparison Graph
Related Comparisons
| A | Pair | B | Context |
|---|---|---|---|
GPT-5.1OpenAI | vs | GPT-5.2OpenAI | family variantsimage, text |
GPT-5OpenAI | vs | GPT-5.1OpenAI | family variantsimage, text |
Claude Sonnet 4.5Anthropic | vs | Claude Sonnet 4.6Anthropic | family variantsimage, text |
GPT-5.1OpenAI | vs | GPT-5.2 ProOpenAI | family variantsimage, text |
GPT-5.1OpenAI | vs | GPT-5.5OpenAI | family variantsimage, text |
Claude Opus 4.6Anthropic | vs | Claude Sonnet 4.6Anthropic | family variantsimage, text |
Claude Opus 4.7Anthropic | vs | Claude Sonnet 4.6Anthropic | family variantsimage, text |
Claude Sonnet 4.6Anthropic | vs | Claude Sonnet 5Anthropic | family variantsimage, text |
Claude Sonnet 4.6Anthropic | vs |  Qwen3.7 FlashQwen | cross-developer peersimage, text |
Claude Sonnet 4.6Anthropic | vs | Grok 4.3xAI | cross-developer peersimage, text |
Claude Sonnet 4.6Anthropic | vs | GPT-5.4OpenAI | cross-developer peersimage, text |
GPT-5.1OpenAI | vs | Grok 4.5xAI | cross-developer peersimage, text |
Primary Evidence
Sources and Freshness
Questions
Claude Sonnet 4.6 vs GPT-5.1 FAQs
Is Claude Sonnet 4.6 or GPT-5.1 better for coding?+
This comparison does not currently contain a protocol-matched coding benchmark for both Claude Sonnet 4.6 and GPT-5.1, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.
Which is cheaper, Claude Sonnet 4.6 or GPT-5.1?+
Claude Sonnet 4.6 is $3.00 and GPT-5.1 is $1.25 per million tokens, so GPT-5.1 is cheaper on this metric. Claude Sonnet 4.6 is $15.00 and GPT-5.1 is $10.00 per million tokens, so GPT-5.1 is cheaper on this metric.
Which has a larger context window, Claude Sonnet 4.6 or GPT-5.1?+
Claude Sonnet 4.6 has the larger sourced context window. Claude Sonnet 4.6 supports 1,000,000 and GPT-5.1 supports 400,000.
Which performs better in benchmarks, Claude Sonnet 4.6 or GPT-5.1?+
Claude Sonnet 4.6 leads the current overall benchmark count. The result uses 7 protocol-matched benchmarks from 3 publishers; it is not a universal quality score.
Can Claude Sonnet 4.6 or GPT-5.1 be self-hosted?+
Both models have the same recorded self-hosting status: unsupported. Claude Sonnet 4.6 is not marked open weight; GPT-5.1 is not marked open weight.
Can Claude Sonnet 4.6 and GPT-5.1 understand images?+
Claude Sonnet 4.6 is not documented with image input; GPT-5.1 is not documented with image input. This reflects supported input modalities, not vision quality.
Which can generate longer answers, Claude Sonnet 4.6 or GPT-5.1?+
Neither has a larger sourced maximum output. Claude Sonnet 4.6 is 128,000 and GPT-5.1 is 128,000.
Do Claude Sonnet 4.6 and GPT-5.1 support reasoning and tool use?+
Claude Sonnet 4.6: reasoning and tool calling. GPT-5.1: reasoning and tool calling. Feature support does not establish relative quality.
Which is available from more inference providers, Claude Sonnet 4.6 or GPT-5.1?+
Claude Sonnet 4.6 has 2 sourced provider routes; GPT-5.1 has 2, a tie.
Which offers better value, Claude Sonnet 4.6 or GPT-5.1?+
There is no universal value winner. Compare the input and output prices above with the matched benchmark result for your workload: cheaper tokens can be offset by different quality, token usage, latency, or provider availability.