Claude Opus 4.5 vs Gemini 3.1 Pro
Model Markets Rankings
Intelligence, Cost, and Efficiency
| Ranking | Claude Opus 4.5 | Gemini 3.1 Pro |
|---|---|---|
| CostLower is better · Published-token output estimate | #34 of 36$0.380 per LiveBench case | #22 of 36$0.161 per LiveBench case |
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 Opus 4.5 | Gemini 3.1 Pro |
|---|---|---|
| LMArena Document Arenadocument-2026-07-30-011508720696 · arena_rating · statistical tie | 1,461.65100% of row best · rating · claude-opus-4-5-20251101; 95% CI [1451.22442739, 1472.08183979]; votes 7965; rank 19 | 1,445.3299% of row best · rating · gemini-3.1-pro-preview; 95% CI [1439.35538449, 1451.29339146]; votes 45162; rank 23 |
| LMArena Search Arenasearch-2026-08-24-011508720696 · arena_rating · leader | 1,179.6497% of row best · rating · claude-opus-4-5-search; 95% CI [1174.02872051, 1185.26030035]; votes 61573; rank 19 | 1,210.46100% of row best · rating · gemini-3.1-pro-grounding; 95% CI [1205.32063396, 1215.60669852]; votes 113282; rank 9 |
| LMArena Text Arenatext-2026-09-01-011508720696 · arena_rating · leader | 1,447.1998% of row best · rating · claude-opus-4-5-20251101-high-32k; 95% CI [1443.28922560, 1451.09589305]; votes 36271; rank 46 | 1,480.10100% of row best · rating · gemini-3.1-pro-preview; 95% CI [1476.89767236, 1483.30025658]; votes 102763; rank 11 |
| LiveBench2026-06-25 · overall · leader | 77.3995% of row best · percent · claude-opus-4-5-20251101-thinking-64k-high-effort · 15,203 output tokens / case | 81.66100% of row best · percent · gemini-3.1-pro-preview-high · 13,380 output tokens / case |
| Overall ResultCounted from the protocol-matched rows above · 1 tie | 0 benchmark wins | 3 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 Opus 4.5 | Gemini 3.1 Pro |
|---|---|---|
| Developer | Anthropic | Google DeepMind |
| Family | Claude 4 | Gemini 3 |
| Model | Claude Opus 4.5 | Gemini 3.1 Pro |
| Version | Claude Opus 4.5 | Gemini 3.1 Pro |
| Lifecycle | active | preview |
| Released | 2025-11-24 | Unknown |
| Knowledge cutoff | 2025-05-01 | Unknown |
| Input modalities | Text, Image | Text, Image, Video, Audio, Document |
| Output modalities | Text | Text |
| Context window | 200K | 1,049K |
| 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) | Google AI (Standard), Google Gemini (Standard) |
| Capabilities | chat, generation, reasoning, structured_outputs, tools | chat, generation, reasoning, tools |
13 comparable fields · 9 material differences · Pair passes the primary-source comparison gate
Claude Opus 4.5 Capabilities
Gemini 3.1 Pro Capabilities
Internal Comparison Graph
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|---|---|---|---|
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Primary Evidence
Sources and Freshness
Questions
Claude Opus 4.5 vs Gemini 3.1 Pro FAQs
Is Claude Opus 4.5 or Gemini 3.1 Pro better for coding?+
This comparison does not currently contain a protocol-matched coding benchmark for both Claude Opus 4.5 and Gemini 3.1 Pro, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.
Which is cheaper, Claude Opus 4.5 or Gemini 3.1 Pro?+
Claude Opus 4.5 is $5.00 and Gemini 3.1 Pro is $2.00 per million tokens, so Gemini 3.1 Pro is cheaper on this metric. Claude Opus 4.5 is $25.00 and Gemini 3.1 Pro is $12.00 per million tokens, so Gemini 3.1 Pro is cheaper on this metric.
Which has a larger context window, Claude Opus 4.5 or Gemini 3.1 Pro?+
Gemini 3.1 Pro has the larger sourced context window. Claude Opus 4.5 supports 200K and Gemini 3.1 Pro supports 1,049K.
Which performs better in benchmarks, Claude Opus 4.5 or Gemini 3.1 Pro?+
Gemini 3.1 Pro leads the current overall benchmark count. The result uses 4 protocol-matched benchmarks from 2 publishers; it is not a universal quality score.
Can Claude Opus 4.5 or Gemini 3.1 Pro be self-hosted?+
Both models have the same recorded self-hosting status: unsupported. Claude Opus 4.5 is not marked open weight; Gemini 3.1 Pro is not marked open weight.
Can Claude Opus 4.5 and Gemini 3.1 Pro understand images?+
Claude Opus 4.5 is documented with image input; Gemini 3.1 Pro is documented with image input. This reflects supported input modalities, not vision quality.
Which can generate longer answers, Claude Opus 4.5 or Gemini 3.1 Pro?+
Gemini 3.1 Pro has the larger sourced maximum output: Claude Opus 4.5 supports 64K and Gemini 3.1 Pro supports 66K output tokens.
Do Claude Opus 4.5 and Gemini 3.1 Pro support reasoning and tool use?+
Claude Opus 4.5: reasoning, tool calling, and image input. Gemini 3.1 Pro: reasoning, tool calling, and image input. Feature support does not establish relative quality.
Which is available from more inference providers, Claude Opus 4.5 or Gemini 3.1 Pro?+
Claude Opus 4.5 has 1 sourced provider route; Gemini 3.1 Pro has 2, so Gemini 3.1 Pro has broader tracked availability.
Which offers better value, Claude Opus 4.5 or Gemini 3.1 Pro?+
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.