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© 2026 CompareLLM. Public benchmark data aggregated from Arena Elo, LiveBench, SWE-bench & OpenRouter.

Every score has a dated snapshot.

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  3. Claude Opus 4.5 vs Google Gemini Flash Latest

Pairwise benchmark snapshot · Aug 17, 2026noindex (thin pair)

Claude Opus 4.5 vs Google Gemini Flash Latest benchmark

In this head-to-head showdown, Google Gemini Flash Latest is more budget-friendly at $1.875/1M per 1M output tokens. Review the complete breakdown below to determine which model best fits your performance and budget requirements.

Executive Comparison Verdict

Bottom Line: Choose Claude Opus 4.5 if your priority is peak reasoning, complex code generation, and top preference Elo. Choose Google Gemini Flash Latest if you are optimizing for low latency, high throughput, and cost-efficient API deployment.
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Verified Head-to-Head Advantage Breakdown

3 direct benchmark disciplines evaluated across capability, speed, and cost

Claude Opus 4.5 (0)Google Gemini Flash Latest (3)
Claude Opus 4.5
0 of 3 Wins
Competitive baseline across remaining benchmarks
Google Gemini Flash Latest
3 of 3 Wins
✓Input price✓Output price✓Context window
Anthropic
Claude Opus 4.5

Anthropic frontier coding and computer-use model. SWE-bench leader on the official mini-SWE-agent harness in the Feb 2026 refresh.

Elo 1,568$25/1M out
~google
Leads 3 of 3 metrics
Google Gemini Flash Latest

Auto-discovered from OpenRouter (~google/gemini-flash-latest). Preview until a second source matches.

$1.875/1M out

Claude Opus 4.5 Thinking Depth & Cost Scaler

Model A

Simulate accuracy gains vs added response time & token cost

Mode: Medium (16k budget)

Reasoning models “think before answering” by generating internal reasoning tokens. Higher effort improves math, coding, and logic accuracy, but increases response delay and token costs.

Thinking Delay
380 ms
Standard speed
Reasoning Depth
~3,200
Internal tokens
Cost / 1k Calls
$90.00
9.0× standard bill
Accuracy Boost
+5.2% accuracy
STEM & SWE-bench
Top Rival Showdowns for Claude Opus 4.5
All Matchups
Compare vs:vs GPT-5vs Gemini 3 Provs Grok 4.6vs DeepSeek V4 Provs Qwen 3 Max
Preference Leader

No shared data

Single model data

Throughput Leader

No shared data

No latency data

Value per Dollar LeaderGoogle Gemini Flash Latest Wins

Google Gemini Flash Latest

$1.875 / 1M output

Capability Percentiles

Relative percentile scores computed across all active models in the benchmark catalog.

Multi-Dimensional Capability Radar

Leaders Matchup Capability Radar

Comparing top Western standard models with China's leading frontier rival across 6 skill dimensions. Tap any spoke or dot to inspect.

Tap any node to inspect
0–100 %ile
Head-to-Head Comparison

Overall Matchup Breakdown

Category wins across reasoning intelligence, generation speed, and token cost.

Claude Opus 4.5 (7)vsGoogle Gemini Flash Latest (3)
Claude Opus 4.5: 7W (70%)Overall: Claude Opus 4.5Google Gemini Flash Latest: 3W (30%)
← Claude Opus 4.5Google Gemini Flash Latest →
🏆Claude Opus 4.5(5/5)

Intelligence & Reasoning

Preference Elo, Coding proficiency, SWE-bench & LiveBench accuracy

Benchmark
Claude Opus 4.5vsGoogle Gemini Flash Latest
Preference Elo
1,568vs—
Coding Elo
1,574vs—
SWE-bench
76.8%vs—
LiveBench
71.2%vs—
GPQA Diamond
84.1%vs—
Claude Opus 4.5: 5WGoogle Gemini Flash Latest: 0W
🏆Claude Opus 4.5(2/2)

Speed & Latency

Generation throughput and time to first token responsiveness

Benchmark
Claude Opus 4.5vsGoogle Gemini Flash Latest
Output speed
62 tok/svs—
Time to first token
380 msvs—
Claude Opus 4.5: 2WGoogle Gemini Flash Latest: 0W
🏆Google Gemini Flash Latest(3/3)

Pricing & Capacity

Cost per million tokens and max context window length

Benchmark
Claude Opus 4.5vsGoogle Gemini Flash Latest
Output price
$25/1Mvs$1.875/1M+$23.125/1M
Input price
$5/1Mvs$0.375/1M+$4.625/1M
Context window
200kvs1M+849k
Claude Opus 4.5: 0WGoogle Gemini Flash Latest: 3W

Side-by-Side Benchmark Matrix

Preference Elo
Claude Opus 4.51,568
lmarena · Aug 17, 2026
Google Gemini Flash Latest—
Coding Elo
Claude Opus 4.51,574
lmarena · Aug 17, 2026
Google Gemini Flash Latest—
LiveBench
Claude Opus 4.571.2%
livebench · Aug 17, 2026
Google Gemini Flash Latest—
SWE-bench
Claude Opus 4.576.8%
swebench · Aug 17, 2026
Google Gemini Flash Latest—
GPQA Diamond
Claude Opus 4.584.1%
seed-bootstrap · Aug 1, 2026
Google Gemini Flash Latest—
Time to first token
Claude Opus 4.5380 ms
seed-bootstrap · Aug 1, 2026
Google Gemini Flash Latest—
Output speed
Claude Opus 4.562 tok/s
seed-bootstrap · Aug 1, 2026
Google Gemini Flash Latest—
Input price+$4.625/1M
Claude Opus 4.5$5/1M
openrouter · Aug 17, 2026
Google Gemini Flash Latest$0.375/1M
openrouter · Aug 17, 2026
Output price+$23.125/1M
Claude Opus 4.5$25/1M
openrouter · Aug 17, 2026
Google Gemini Flash Latest$1.875/1M
openrouter · Aug 17, 2026
Context window+849k
Claude Opus 4.5200k
openrouter · Aug 17, 2026
Google Gemini Flash Latest1M
openrouter · Aug 17, 2026
BenchmarkClaude Opus 4.5Google Gemini Flash LatestAdvantage Delta
Preference Elo
1,568
lmarena · Aug 17, 2026
——
Coding Elo
1,574
lmarena · Aug 17, 2026
——
LiveBench
71.2%
livebench · Aug 17, 2026
——
SWE-bench
76.8%
swebench · Aug 17, 2026
——
GPQA Diamond
84.1%
seed-bootstrap · Aug 1, 2026
——
Time to first token
380 ms
seed-bootstrap · Aug 1, 2026
——
Output speed
62 tok/s
seed-bootstrap · Aug 1, 2026
——
Input price
$5/1M
openrouter · Aug 17, 2026
$0.375/1M
openrouter · Aug 17, 2026
+$4.625/1M
Output price
$25/1M
openrouter · Aug 17, 2026
$1.875/1M
openrouter · Aug 17, 2026
+$23.125/1M
Context window
200k
openrouter · Aug 17, 2026
1M
openrouter · Aug 17, 2026
+849k
Interactive Simulator (USD)

Workload Cost & Savings Calculator

Simulate monthly production API costs in USD (US Dollar).

Save up to 93% with Google Gemini Flash Latest
Monthly Volume50M tokens/mo
Quick Presets:
Token Ratio (In vs Out)70% In / 30% Out
RAG / Search (10% out)Coding / Chat (50% out)
Claude Opus 4.5$550.00 / mo
In: $175Out: $375
Google Gemini Flash Latest$41.25 / mo
In: $13.13Out: $28.13
Estimated Cost Delta

Google Gemini Flash Latest is estimated to save $508.75/month ($6,105/year).

Based on 50M tokens (30% gen)

Key Selection Recommendations

  • 1
    Google Gemini Flash Latest:Pick Google Gemini Flash Latest when you are optimizing output cost.
  • 2
    Google Gemini Flash Latest:Pick Google Gemini Flash Latest for million-token RAG or long-document jobs.

Recommended Workload Routing

Repo / coding agentsinsufficient data

Need SWE-bench on both sides.

High-volume chatGoogle Gemini Flash Latest

Lower output list price ($1.875/1M).

Voice / low-latency UIinsufficient data

Need TTFT on both sides.

Long-document RAGGoogle Gemini Flash Latest

Larger window (1M).

Screenshots / visionClaude Opus 4.5

Claude Opus 4.5 is the side marked multimodal in the catalog.

Target WorkloadRecommended PickEvaluation Rationale
Repo / coding agentsinsufficient dataNeed SWE-bench on both sides.
High-volume chatGoogle Gemini Flash LatestLower output list price ($1.875/1M).
Voice / low-latency UIinsufficient dataNeed TTFT on both sides.
Long-document RAGGoogle Gemini Flash LatestLarger window (1M).
Screenshots / visionClaude Opus 4.5Claude Opus 4.5 is the side marked multimodal in the catalog.

Related Editorial Dispatches & Benchmark Notes

View all news
launchFeb 20, 2026

Claude Opus 4.5 and the Feb 2026 SWE-bench row we still cite

The Feb refresh made 4.5 a coding reference. Newer Opus SKUs exist; this row stays as the dated harness point.

Community Sentiment

Cast Your Matchup Vote

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CompareLLM AI Matrix

Verified Head-to-Head Telemetry

LIVE BENCHMARK
VS
Anthropic

Claude Opus 4.5

Elo 1,568
SWE-bench76.8%
Speed (tok/s)62 tok/s
Input / 1M Tokens$5/1M
Output / 1M Tokens$25/1M
~google

Google Gemini Flash Latest

Elo n/a
SWE-bench—
Speed (tok/s)1M
Input / 1M Tokens$0.375/1M
Output / 1M Tokens$1.875/1M

Frequently Asked Questions

Which is better overall, Claude Opus 4.5 or Google Gemini Flash Latest?
We do not have preference Elo for both models, so we do not declare an overall winner. Compare the metrics that exist.
Which is better at coding, Claude Opus 4.5 or Google Gemini Flash Latest?
SWE-bench is missing for at least one model, so we do not rank coding from a single number.
Which is cheaper to run in production?
Google Gemini Flash Latest output tokens are $1.875/1M versus $25/1M. Input prices and retry rates still move the real bill.
Which is faster, Claude Opus 4.5 or Google Gemini Flash Latest?
We do not have TTFT for both models.
Which has the larger context window?
Google Gemini Flash Latest accepts 1M tokens versus 200k.
Can I self-host either model?
Neither model is marked open-weights here. You are comparing hosted APIs.
Are these scores from CompareLLM’s own evals?
No. V1 aggregates public leaderboards (and optional first-party latency pings). Each cell names its source and date. Read /methodology.
What does preference Elo mean on this page?
Preference Elo is a crowd vote from LMArena / Arena. People see two hidden answers and pick the one they like more. The model that wins more often gets a higher Elo. That means people preferred it — not that it passed a school test. It is not SWE-bench, not accuracy, and not a number we invent. Claude Opus 4.5 and Google Gemini Flash Latest Elo cells are dated snapshots from the named source — we do not compute Arena ourselves.

Related news

  • launch · Feb 20, 2026

    Claude Opus 4.5 and the Feb 2026 SWE-bench row we still cite

Similar Head-to-Head Comparisons

All Claude Opus 4.5 matchups →|All Google Gemini Flash Latest matchups →
Claude Opus 4.5 vs Claude Opus 4 (previous opus)Claude Opus 4.5 vs Claude Opus 4.6 (next opus)Claude Sonnet 5 vs Claude Opus 4.5Claude Opus 4.8 vs Claude Opus 4.5Claude Sonnet 4.5 vs Claude Opus 4.5Claude Fable 5 vs Claude Opus 4.5