Long documents
Prompts that approach the documented context limit
GPT-5.6 Sol
GPT-5.6 Sol has the larger documented context window.
Confidence: documented
Gemini 2.5 Flash vs GPT-5.6 Sol
Updated September 24, 2026. Rank says GPT-5.6 Sol is ahead. Price, access, and your workload can each overturn that. Public scores include evidence status and uncertainty.
Both of these models will change. Get the price, version and retirement notices for the pair, each with its source. Follow model changes
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Decision reading
GPT-5.6 Sol has the higher public score, 78.49 versus 43, and the 90% score intervals do not overlap. 2 results are shared. Category rows resting on Estimated evidence or different benchmark sets are marked directional and do not name a winner.
- Shared results
- 2
- Gemini 2.5 Flash only
- 0
- GPT-5.6 Sol only
- 35
- Like-for-like categories
- 0 / 8
Supported: Gemini 2.5 Flash and GPT-5.6 SolHow the comparison works
Which one for your work
Recommendations appear only when a shared evidence basis or an explicit operating constraint supports the call. Secondary and unsupported use cases stay disclosed below the initial list.
Chat turn cost
1K fresh input + 500 output tokens
Gemini 2.5 Flash
Gemini 2.5 Flash has the lower estimated token cost for this stated workload. Costs use the listed standard API rates.
Confidence: listed-ratesCache-heavy agent loop cost
200K cached + 20K fresh input + 10K output tokens
Gemini 2.5 Flash
Gemini 2.5 Flash has the lower estimated token cost for this stated workload. Costs use the listed standard API rates.
Confidence: listed-rates
Show secondary and unsupported calls
Repository review cost
50K fresh input + 3K output tokens
Gemini 2.5 Flash
Gemini 2.5 Flash has the lower estimated token cost for this stated workload. Costs use the listed standard API rates.
Confidence: listed-ratesCoding work
Code generation, repair, and software-engineering tasks
Not enough matched evidence
Gemini 2.5 Flash is not ranked on the public lane for coding, so no winner is named for coding.
Confidence: limitedAgentic work
Tool use, computer use, and multi-step task completion
Not enough matched evidence
Gemini 2.5 Flash is not ranked on the public lane for agentic, so no winner is named for agentic.
Confidence: limited
Which one for a specific job
Choose a job from the LLM Selector's task catalog to see the category row it rests on, under the same basis rules as the table below. A directional row stays directional; choosing a job never creates a winner.
The same task catalog as the LLM Selector. Each job names the evidence surface it rests on; nothing here adds a new score.
—Gemini 2.5 Flash71.6GPT-5.6 Sol
Not comparable · BenchAlign v5.7
The coding row is not comparable on the public lane: at least one model is not measured or not ranked there.
Coding scores combine specific tasks and setups. Match the editor, harness, and effort to your workflow.
Same basis rules as the category table below
What is actually comparable
Shared results can support a head-to-head reading. Results present for only one model describe coverage, not superiority.
2 Shared
35 GPT-5.6 Sol only
2 categories rest on Estimated evidence or different evidence sets. Those rows remain visible for coverage context but do not name a winner.
Shape of the matched evidence
Only shared public evidence is shown. Sparse evidence stays a ruled list rather than being closed into a radar shape.
Too few matched category axes support a radar. The ruled list below shows only shared benchmark results; positions use each benchmark’s normalized display scale when available.
FrontierMath v2 (Tiers 1-3)Math
Normalized gap 84.2Gemini 2.5 Flash:4.844%GPT-5.6 Sol:89.000%FrontierMath v2 (Tier 4)Math
Normalized gap 78.8Gemini 2.5 Flash:4.167%GPT-5.6 Sol:83.000%
Bars run 0–100 on each benchmark’s normalized display scale
Category results, on a stated basis
Each row shows the public-lane category score for both models: the BenchAlign v5.7 lane for agentic, coding, and knowledge, and the weighted public rows elsewhere, with the same rank each model page reports. A row is like-for-like only when both scores rest on Supported evidence or the same weighted set. Directional and not-comparable rows remain visible, but they never receive a winner.
Knowledge
Directional only- Gemini 2.5 Flash
- 35.7
- Estimated · #105/158
- GPT-5.6 Sol
- 78.8
- Supported · #7/158
- Basis
- BenchAlign v5.7 lane · 0 vs 8 public rows
- Reading
- Directional only
Instruction following
Directional only- Gemini 2.5 Flash
- 43.7
- #93/124
- GPT-5.6 Sol
- 87.7
- #28/124
- Basis
- Provisional lane · 0 vs 0 weighted rows
- Reading
- Directional only
Agentic
Not comparable- Gemini 2.5 Flash
- Not ranked
- GPT-5.6 Sol
- 69.6
- Supported · #7/105
- Basis
- BenchAlign v5.7 lane · 0 vs 9 public rows
- Reading
- Not comparable
Coding
Not comparable- Gemini 2.5 Flash
- Not ranked
- GPT-5.6 Sol
- 71.6
- Supported · #6/135
- Basis
- BenchAlign v5.7 lane · 0 vs 12 public rows
- Reading
- Not comparable
Reasoning
Not comparable- Gemini 2.5 Flash
- 56.4
- Unranked · 2 rankable rows
- GPT-5.6 Sol
- 72.1
- #8/19
- Basis
- Provisional lane · 0 vs 2 weighted rows
- Reading
- Not comparable
Multimodal
Not comparable- Gemini 2.5 Flash
- 56.6
- Unranked · 1 rankable row
- GPT-5.6 Sol
- 87.6
- #5/50
- Basis
- Provisional lane · 0 vs 1 weighted rows
- Reading
- Not comparable
Multilingual
Not comparable- Gemini 2.5 Flash
- Not ranked
- GPT-5.6 Sol
- Not ranked
- Basis
- Provisional lane · 0 vs 0 weighted rows
- Reading
- Not comparable
Math
Not comparable- Gemini 2.5 Flash
- 28.6
- Unranked · 2 rankable rows
- GPT-5.6 Sol
- 96.8
- Unranked · 3 rankable rows
- Basis
- Provisional lane · 2 vs 2 weighted rows
- Reading
- Not comparable
| Category | Gemini 2.5 Flash | GPT-5.6 Sol | Basis | Reading |
|---|---|---|---|---|
| Knowledge | 35.7Estimated · #105/158 | 78.8Supported · #7/158 | Directional onlyBenchAlign v5.7 lane · 0 vs 8 public rows | Directional only |
| Instruction following | 43.7#93/124 | 87.7#28/124 | Directional onlyProvisional lane · 0 vs 0 weighted rows | Directional only |
| Agentic | Not ranked | 69.6Supported · #7/105 | Not comparableBenchAlign v5.7 lane · 0 vs 9 public rows | Not comparable |
| Coding | Not ranked | 71.6Supported · #6/135 | Not comparableBenchAlign v5.7 lane · 0 vs 12 public rows | Not comparable |
| Reasoning | 56.4Unranked · 2 rankable rows | 72.1#8/19 | Not comparableProvisional lane · 0 vs 2 weighted rows | Not comparable |
| Multimodal | 56.6Unranked · 1 rankable row | 87.6#5/50 | Not comparableProvisional lane · 0 vs 1 weighted rows | Not comparable |
| Multilingual | Not ranked | Not ranked | Not comparableProvisional lane · 0 vs 0 weighted rows | Not comparable |
| Math | 28.6Unranked · 2 rankable rows | 96.8Unranked · 3 rankable rows | Not comparableProvisional lane · 2 vs 2 weighted rows | Not comparable |
Ranks count the models scored in each category’s lane, so the agentic, coding, and knowledge denominators (BenchAlign v5.7) differ from the provisional-lane categories. Unranked scores sit on the provisional lane’s scale but never name a winner. Like-for-like rows within 0.5 points read as a practical tie.
Supported evidence per lane · bars run 0–100Methodology
What each workload costs
Three fixed token mixes turn per-token rates into comparable decisions. Each scenario states context fit and whether cached input had to fall back to the published list-input rate.
Chat turn
1K fresh input + 500 output tokens
- Gemini 2.5 Flash
- $0.00155
- Fits in one request
- GPT-5.6 Sol
- $0.014
- Fits in one request
Gemini 2.5 Flash has the lower modeled cost
Costs use the listed standard API rates.
Repository review
50K fresh input + 3K output tokens
- Gemini 2.5 Flash
- $0.0225
- Fits in one request
- GPT-5.6 Sol
- $0.26
- Fits in one request
Gemini 2.5 Flash has the lower modeled cost
Costs use the listed standard API rates.
Cache-heavy agent loop
200K cached + 20K fresh input + 10K output tokens
- Gemini 2.5 Flash
- $0.037
- Fits in one request
- GPT-5.6 Sol
- $0.36
- Fits in one request
Gemini 2.5 Flash has the lower modeled cost
Costs use the listed standard API rates.
Cached input falls back to the list input rate only where a cached rate is unpublished
Specification differences
Sourced differences are shown directly. Missing facts stay explicit instead of being inferred from a model name or family.
SpecificationGemini 2.5 FlashGPT-5.6 Sol
Context window
Maximum documented context; output-token limits may be lower.
Gemini 2.5 Flash
GPT-5.6 Sol
1.05M
OpenAI model catalogAPI model ID
Gemini 2.5 Flash
gemini-2.5-flash
Google Gemini API pricingGPT-5.6 Sol
gpt-5.6-sol
OpenAI model catalogCached-input rate
A missing cached-input rate falls back to the listed input rate only in the stated workload estimate.
Gemini 2.5 Flash
$0.03 per 1M cached input tokens
Google Gemini API pricingGPT-5.6 Sol
$0.4 per 1M cached input tokens
OpenAI pricingDocumented inputs
Gemini 2.5 Flash
Not sourced
GPT-5.6 Sol
text, image
OpenAI model catalogDocumented outputs
Gemini 2.5 Flash
Not sourced
GPT-5.6 Sol
Provider availability
Gemini 2.5 Flash
Not sourced
GPT-5.6 Sol
Generally Available · OpenAI Responses API
OpenAI model catalogReasoning profile
Gemini 2.5 Flash
Non-Reasoning
GPT-5.6 Sol
Reasoning
Weight access
Gemini 2.5 Flash
Proprietary
GPT-5.6 Sol
Proprietary
License
Gemini 2.5 Flash
Proprietary
GPT-5.6 Sol
Proprietary
Release date
Gemini 2.5 Flash
2025-06-17
GPT-5.6 Sol
2026-07-09
If you already use one of these models
- Deployment change
- The models list different providers, so authentication, endpoint behavior, limits, and feature support may change.
- Quality signal
- GPT-5.6 Sol has the higher public score, 78.49 versus 43, and the 90% score intervals do not overlap.
- Workload cost
- Repository review: $0.0225 vs $0.26. Cache-heavy agent loop: $0.037 vs $0.36.
- Context tradeoff
- GPT-5.6 Sol has the larger documented window (1.05M).
Run the same representative tasks against both endpoints before changing production traffic.
Questions
Which is better, Gemini 2.5 Flash or GPT-5.6 Sol?
GPT-5.6 Sol has the higher public score, 78.49 versus 43, and the 90% score intervals do not overlap. That is the clearest overall quality signal in the current public data.
Which is better for coding, Gemini 2.5 Flash or GPT-5.6 Sol?
Gemini 2.5 Flash is not ranked on the public lane for coding, so no winner is named for coding.
Which is better for agentic tasks, Gemini 2.5 Flash or GPT-5.6 Sol?
Gemini 2.5 Flash is not ranked on the public lane for agentic tasks, so no winner is named for agentic tasks.
Which costs less, Gemini 2.5 Flash or GPT-5.6 Sol?
For the stated presets, chat costs $0.00155 on Gemini 2.5 Flash and $0.014 on GPT-5.6 Sol; repository review costs $0.0225 and $0.26; the cache-heavy agent loop costs $0.037 and $0.36. Costs use the listed standard API rates.
Which has the larger context window, Gemini 2.5 Flash or GPT-5.6 Sol?
GPT-5.6 Sol has the larger documented context window: 1.05M, compared with 1M.
Benchmark evidence
The full public result ledger is available for audit without forcing a wide desktop table onto a phone.
Browse raw public benchmark evidence37 rows
Agentic
Terminal-Bench 3.0
Gemini 2.5 Flash—GPT-5.6 Sol34.6%SourceNot directly comparable
Terminal-Bench 2.1
Gemini 2.5 Flash—GPT-5.6 Sol91.9%SourceNot directly comparable
BrowseComp
Gemini 2.5 Flash—GPT-5.6 Sol92.2%SourceNot directly comparable
OSWorld 2.0
Gemini 2.5 Flash—GPT-5.6 Sol62.6%SourceNot directly comparable
CyberGym
Gemini 2.5 Flash—GPT-5.6 Sol84.5%SourceNot directly comparable
ExploitGym
Gemini 2.5 Flash—GPT-5.6 Sol33.7%SourceNot directly comparable
Toolathlon
Gemini 2.5 Flash—GPT-5.6 Sol58%SourceNot directly comparable
Terminal-Bench 2.1 (Vals)
Gemini 2.5 Flash—GPT-5.6 Sol85.8%SourceNot directly comparable
ApprenticeBench
Gemini 2.5 Flash—GPT-5.6 Sol26%SourceNot directly comparable
Coding
Bug Hunt Bench
Gemini 2.5 Flash—GPT-5.6 Sol42 fixesSourceNot directly comparable
SWE-bench Pro
Gemini 2.5 Flash—GPT-5.6 Sol64.6%SourceNot directly comparable
Terminal-Bench 2.1
Gemini 2.5 Flash—GPT-5.6 Sol91.9%SourceNot directly comparable
DeepSWE
Gemini 2.5 Flash—GPT-5.6 Sol72.7%SourceNot directly comparable
FrontierCode 1.1 Extended
Gemini 2.5 Flash—GPT-5.6 Sol60.6%SourceNot directly comparable
FrontierSWE v2
Gemini 2.5 Flash—GPT-5.6 Sol32.2%SourceNot directly comparable
cursorBench32
Gemini 2.5 Flash—GPT-5.6 Sol67.2%SourceNot directly comparable
VulcanBench v3
Gemini 2.5 Flash—GPT-5.6 Sol87.0%SourceNot directly comparable
VulcanBench CII v1
Gemini 2.5 Flash—GPT-5.6 Sol86.5%SourceNot directly comparable
LiveCodeBench (Vals)
Gemini 2.5 Flash—GPT-5.6 Sol82.6%SourceNot directly comparable
SWE-bench (Vals)
Gemini 2.5 Flash—GPT-5.6 Sol96.2%SourceNot directly comparable
cursorBench40
Gemini 2.5 Flash—GPT-5.6 Sol41.7%SourceNot directly comparable
Reasoning
Multimodal
Knowledge
GPQA
Gemini 2.5 Flash—GPT-5.6 Sol94.6%SourceNot directly comparable
GPQA-D
Gemini 2.5 Flash—GPT-5.6 Sol94.6%SourceNot directly comparable
HLE-Verified
Gemini 2.5 Flash—GPT-5.6 Sol54.5%SourceNot directly comparable
LABBench2
Gemini 2.5 Flash—GPT-5.6 Sol82.1%SourceNot directly comparable
HealthBench Professional
Gemini 2.5 Flash—GPT-5.6 Sol60.5%SourceNot directly comparable
HealthBench Hard
Gemini 2.5 Flash—GPT-5.6 Sol33.1%SourceNot directly comparable
GPQA Diamond (Vals)
Gemini 2.5 Flash—GPT-5.6 Sol95.2%SourceNot directly comparable
MMLU-Pro (Vals)
Gemini 2.5 Flash—GPT-5.6 Sol89.1%SourceNot directly comparable
Math
37 public results · 2 shared
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Last updated September 24, 2026