Claude Sonnet 4.6 vs GPT-5.6 Sol
Model Markets Rankings
Intelligence, Cost, and Efficiency
| Ranking | Claude Sonnet 4.6 | GPT-5.6 Sol |
|---|---|---|
| IntelligenceHigher is better · MM Intelligence v1.2 | #16 of 2260.3 score | #4 of 2285.2 score |
| CostLower is better · Published-token output estimate | #25 of 36$0.198 per LiveBench case | #20 of 36$0.117 per LiveBench case |
| EfficiencyHigher is better · MM Efficiency v1.0 | #17 of 2246.0 score | #3 of 2263.6 score |
Ranks come from the current complete eligible cohorts. Green highlights appear only when both models are ranked in the same metric. Missing required inputs remain unranked, and the three dimensions are not collapsed into an overall winner.
Benchmark Performance
Available Benchmarks
| Benchmark | Claude Sonnet 4.6 | GPT-5.6 Sol |
|---|---|---|
| ARC-AGI-1verified-v1-2aa739d957fc · verified_score · leader | 86.5089% of row best · percent · Claude Sonnet 4.6 (High) | 97.50100% of row best · percent · GPT-5.6 Sol (XHigh) |
| ARC-AGI-2verified-v2-b5cb5ec6e8c7 · verified_score · leader | 60.4265% of row best · percent · Claude Sonnet 4.6 (High) | 92.50100% of row best · percent · GPT-5.6 Sol (Max) |
| LMArena Agent Arenaagent-2026-08-31-011508720696 · outcome_score · leader | 0.9592% of row best · score · Claude Sonnet 4.6; 95% CI [-0.31540788, 2.21833799]; sessions 38385; observations 1371137; rank 31 | 9.76100% of row best · score · GPT 5.6 Sol (xHigh); 95% CI [8.23209281, 11.28769899]; sessions 28524; observations 2917301; rank 4 |
| LMArena Document Arenadocument-2026-07-30-011508720696 · arena_rating · statistical tie | 1,482.80100% of row best · rating · claude-sonnet-4-6; 95% CI [1476.49799837, 1489.09368537]; votes 54427; rank 8 | 1,478.68100% of row best · rating · gpt-5.6-sol-xhigh; 95% CI [1461.94144922, 1495.42273628]; votes 1152; rank 11 |
| LMArena Search Arenasearch-2026-08-24-011508720696 · arena_rating · leader | 1,221.2397% of row best · rating · claude-sonnet-4-6-search; 95% CI [1216.39472071, 1226.06821163]; votes 134905; rank 7 | 1,257.26100% of row best · rating · gpt-5.6-sol-xhigh; 95% CI [1249.79496224, 1264.72573796]; votes 29663; rank 1 |
| LMArena Text Arenatext-2026-09-01-011508720696 · arena_rating · statistical tie | 1,458.01100% of row best · rating · claude-sonnet-4-6; 95% CI [1454.41608210, 1461.60383515]; votes 66343; rank 32 | 1,454.69100% of row best · rating · gpt-5.6-sol-xhigh; 95% CI [1449.58093424, 1459.80348090]; votes 23153; rank 35 |
| LMArena Vision Arenavision-2026-08-27-011508720696 · arena_rating · statistical tie | 1,282.25100% of row best · rating · claude-sonnet-4-6; 95% CI [1275.84615489, 1288.65223369]; votes 25610; rank 25 | 1,276.90100% of row best · rating · gpt-5.6-sol-xhigh; 95% CI [1267.71657009, 1286.08047215]; votes 5837; rank 30 |
| LiveBench2026-06-25 · overall · leader | 77.1190% of row best · percent · claude-sonnet-4-6-thinking-auto-medium-effort · 13,226 output tokens / case | 85.26100% of row best · percent · gpt-5.6-sol-max · 11,729 output tokens / case |
| ToneBench2026-08-28-10-task-cd9819ab6e4d · overall_score · leader | 83.6396% of row best · points · Claude Sonnet 4.6 · 2,525 output tokens / case | 87.35100% of row best · points · GPT-5.6 Sol (default) · 2,955 output tokens / case |
| Overall ResultCounted from the protocol-matched rows above · 3 ties | 0 benchmark wins | 6 benchmark winsOverall lead |
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-5.6 Sol |
|---|---|---|
| Developer | Anthropic | OpenAI |
| Family | Claude 4 | Gpt 5 6 |
| Model | Claude Sonnet 4.6 | GPT-5.6 Sol |
| Version | Claude Sonnet 4.6 | GPT-5.6 Sol |
| Lifecycle | active | active |
| Released | 2026-02-17 | Unknown |
| Knowledge cutoff | 2025-08-01 | 2026-02-16 |
| Input modalities | Text, Image | Text, Image |
| Output modalities | Text | Text |
| Context window | 1,000K | 1,050K |
| 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, tools |
14 comparable fields · 8 material differences · Pair passes the primary-source comparison gate
Claude Sonnet 4.6 Capabilities
GPT-5.6 Sol Capabilities
Internal Comparison Graph
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|---|---|---|---|
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Primary Evidence
Sources and Freshness
Questions
Claude Sonnet 4.6 vs GPT-5.6 Sol FAQs
Is Claude Sonnet 4.6 or GPT-5.6 Sol better for coding?+
This comparison does not currently contain a protocol-matched coding benchmark for both Claude Sonnet 4.6 and GPT-5.6 Sol, 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-5.6 Sol?+
Claude Sonnet 4.6 is $3.00 and GPT-5.6 Sol is $2.00 per million tokens, so GPT-5.6 Sol is cheaper on this metric. Claude Sonnet 4.6 is $15.00 and GPT-5.6 Sol is $10.00 per million tokens, so GPT-5.6 Sol is cheaper on this metric.
Which has a larger context window, Claude Sonnet 4.6 or GPT-5.6 Sol?+
GPT-5.6 Sol has the larger sourced context window. Claude Sonnet 4.6 supports 1,000K and GPT-5.6 Sol supports 1,050K.
Which performs better in benchmarks, Claude Sonnet 4.6 or GPT-5.6 Sol?+
GPT-5.6 Sol leads the current overall benchmark count. The result uses 9 protocol-matched benchmarks from 4 publishers; it is not a universal quality score.
Can Claude Sonnet 4.6 or GPT-5.6 Sol be self-hosted?+
Both models have the same recorded self-hosting status: unsupported. Claude Sonnet 4.6 is not marked open weight; GPT-5.6 Sol is not marked open weight.
Can Claude Sonnet 4.6 and GPT-5.6 Sol understand images?+
Claude Sonnet 4.6 is documented with image input; GPT-5.6 Sol is documented with image input. This reflects supported input modalities, not vision quality.
Which can generate longer answers, Claude Sonnet 4.6 or GPT-5.6 Sol?+
Neither has a larger sourced maximum output. Claude Sonnet 4.6 is 128K and GPT-5.6 Sol is 128K.
Do Claude Sonnet 4.6 and GPT-5.6 Sol support reasoning and tool use?+
Claude Sonnet 4.6: reasoning, tool calling, and image input. GPT-5.6 Sol: reasoning, tool calling, and image input. Feature support does not establish relative quality.
Which is available from more inference providers, Claude Sonnet 4.6 or GPT-5.6 Sol?+
Claude Sonnet 4.6 has 2 sourced provider routes; GPT-5.6 Sol has 2, a tie.
Which offers better value, Claude Sonnet 4.6 or GPT-5.6 Sol?+
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.